1. Sexual Behaviors that Contribute to Unintended Pregnancy and Sexually Transmitted Infections, Including HIV Infection

2. Percentage of High School Students Who Ever Had Sexual Intercourse, by Sex, Grade,* and Race/Ethnicity,* 2013 * 10 > 9, 11 > 9, 11 > 10, 12 > 9, 12 > 10, 12 > 11; B > H, B > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

3. Percentage of High School Students Who Ever Had Sexual Intercourse, 1991-2013 * * Decreased 1991-2013, decreased 1991-2001, no change 2001-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

4. Range and Median Percentage of High School Students Who Ever Had Sexual Intercourse, Across 36 States and 20 Cities, 2013 State and Local Youth Risk Behavior Surveys, 2013

5. No Data 35.2% - 38.7% 38.8% - 43.4% 43.5% - 47.2% 47.3% - 54.2% Percentage of High School Students Who Ever Had Sexual Intercourse State Youth Risk Behavior Surveys, 2013

6. Percentage of High School Students Who Had Sexual Intercourse Before Age 13 Years,* by Sex, † Grade, and Race/Ethnicity, † 2013 *For the first time. † M > F; B > H, B > W, H > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

7. Percentage of High School Students Who Had Sexual Intercourse Before Age 13 Years,* 1991-2013 † *For the first time. † Decreased 1991-2013, decreased 1991-1997, decreased 1997-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

8. Range and Median Percentage of High School Students Who Had Sexual Intercourse Before Age 13 Years,* Across 38 States and 21 Cities, 2013 *For the first time. State and Local Youth Risk Behavior Surveys, 2013

9. No Data 2.6% - 3.8% 3.9% - 4.7% 4.8% - 5.3% 5.4% - 11.8% Percentage of High School Students Who Had Sexual Intercourse Before Age 13 Years* *For the first time. State Youth Risk Behavior Surveys, 2013

10. Percentage of High School Students Who Had Sexual Intercourse With Four or More Persons,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *During their life. † M > F; 10 > 9, 11 > 9, 11 > 10, 12 > 9, 12 > 10, 12 > 11; B > H, B > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

11. Percentage of High School Students Who Had Sexual Intercourse With Four or More Persons,* 1991-2013 † *During their life. † Decreased 1991-2013, decreased 1991-2003, no change 2003-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

12. Range and Median Percentage of High School Students Who Had Sexual Intercourse With Four or More Persons,* Across 35 States and 21 Cities, 2013 *During their life. State and Local Youth Risk Behavior Surveys, 2013

13. No Data 7.7% - 10.7% 10.8% - 12.5% 12.6% - 15.0% 15.1% - 19.7% Percentage of High School Students Who Had Sexual Intercourse With Four or More Persons* *During their life. State Youth Risk Behavior Surveys, 2013

14. Percentage of High School Students Who Were Currently Sexually Active,* by Sex, Grade, † and Race/Ethnicity, † 2013 *Sexual intercourse with at least one person during the 3 months before the survey. † 10 > 9, 11 > 9, 11 > 10, 12 > 9, 12 > 10, 12 > 11; B > H, B > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

15. Percentage of High School Students Who Were Currently Sexually Active,* 1991-2013 † *Sexual intercourse with at least one person during the 3 months before the survey. † Decreased 1991-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

16. Range and Median Percentage of High School Students Who Were Currently Sexually Active,* Across 36 States and 20 Cities, 2013 *Sexual intercourse with at least one person during the 3 months before the survey. State and Local Youth Risk Behavior Surveys, 2013

17. No Data 24.7% - 27.5% 27.6% - 30.8% 30.9% - 33.4% 33.5% - 40.5% Percentage of High School Students Who Were Currently Sexually Active* *Sexual intercourse with at least one person during the 3 months before the survey. State Youth Risk Behavior Surveys, 2013

18. Percentage of High School Students Who Used a Condom,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. † M > F; 9 > 12, 10 > 12, 11 > 12; B > H, B > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

19. Percentage of High School Students Who Used a Condom,* 1991- 2013 † *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. † Increased 1991-2013, increased 1991-2003, decreased 2003-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

20. Range and Median Percentage of High School Students Who Used a Condom,* Across 36 States and 20 Cities, 2013 *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

21. No Data 45.9% - 55.6% 55.7% - 58.5% 58.6% - 60.9% 61.0% - 67.6% Percentage of High School Students Who Used a Condom* *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

22. Percentage of High School Students Who Used Birth Control Pills,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † F > M; 10 > 9, 11 > 9, 12 > 9, 12 > 10, 12 > 11; W > B, W > H (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

23. Percentage of High School Students Who Used Birth Control Pills,* 1991-2013 † *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † Decreased, 1991-1995, increased, 1995-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

24. Range and Median Percentage of High School Students Who Used Birth Control Pills,* Across 34 States and 20 Cities, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

25. No Data 12.3% - 16.3% 16.4% - 19.9% 20.0% - 23.6% 23.7% - 35.7% Percentage of High School Students Who Used Birth Control Pills* *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

26. Percentage of High School Students Who Used an IUD (e.g., Mirena or ParaGard) or Implant (e.g., Implanon or Nexplanon),* by Sex, Grade, † and Race/Ethnicity, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † 11 > 9, 12 > 9, 12 > 10 (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

27. Range and Median Percentage of High School Students Who Used an IUD (e.g., Mirena or ParaGard) or Implant (e.g., Implanon or Nexplanon),* Across 34 States and 20 Cities, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

28. No Data 0.3% - 1.7% 1.8% - 2.3% 2.4% - 2.6% 2.7% - 5.0% Percentage of High School Students Who Used an IUD (e.g., Mirena or ParaGard) or Implant (e.g., Implanon or Nexplanon)* *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

29. Percentage of High School Students Who Used a Shot (e.g., Depo- Provera), Patch (e.g., OrthoEvra), or Birth Control Ring (e.g., NuvaRing),* by Sex, † Grade, † and Race/Ethnicity, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † F > M; 10 > 9, 11 > 9, 12 > 9 (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

30. Range and Median Percentage of High School Students Who Used a Shot (e.g., Depo-Provera), Patch (e.g., OrthoEvra), or Birth Control Ring (e.g., NuvaRing),* Across 34 States and 20 Cities, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

31. No Data 1.3% - 4.5% 4.6% - 5.8% 5.9% - 6.9% 7.0% - 9.5% Percentage of High School Students Who Used a Shot (e.g., Depo- Provera), Patch (e.g., OrthoEvra), or Birth Control Ring (e.g., NuvaRing)* *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

32. Percentage of High School Students Who Used Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † F > M; 10 > 9, 11 > 9, 12 > 9, 12 > 10, 12 > 11; W > B, W > H (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

33. Percentage of High School Students Who Used Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring,* 2011- 2013 † *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. † No change 2011-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 2011-2013

34. Range and Median Percentage of High School Students Who Used Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring,* Across 34 States and 20 Cities, 2013 *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

35. No Data 19.8% - 24.3% 24.4% - 27.4% 27.5% - 32.1% 32.2% - 44.6% Percentage of High School Students Who Used Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring* *Before last sexual intercourse to prevent pregnancy among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

36. Percentage of High School Students Who Used Both a Condom During and Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring Before Last Sexual Intercourse,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *To prevent STD and pregnancy among the 34.0% of students nationwide who were currently sexually active. † F > M; 11 > 9, 12 > 9; W > B, W > H (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

37. Percentage of High School Students Who Used Both a Condom During and Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring Before Last Sexual Intercourse,* 2011-2013 † *To prevent STD and pregnancy among the 34.0% of students nationwide who were currently sexually active. † No change 2011-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 2011-2013

38. Range and Median Percentage of High School Students Who Used Both a Condom During and Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring Before Last Sexual Intercourse,* Across 34 States and 20 Cities, 2013 *To prevent STD and pregnancy among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

39. No Data 6.6% - 8.5% 8.6% - 9.7% 9.8% - 11.2% 11.3% - 17.0% Percentage of High School Students Who Used Both a Condom During and Birth Control Pills; an IUD or Implant; or a Shot, Patch, or Birth Control Ring Before Last Sexual Intercourse* *To prevent STD and pregnancy among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

40. Percentage of High School Students Who Did Not Use Any Method to Prevent Pregnancy,* by Sex, † Grade, and Race/Ethnicity, † 2013 *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. † F > M; B > W, H > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

41. Percentage of High School Students Who Did Not Use Any Method to Prevent Pregnancy,* 1991-2013 † *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. † Decreased 1991-2013, decreased 1991-2007, no change 2007-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

42. Range and Median Percentage of High School Students Who Did Not Use Any Method to Prevent Pregnancy,* Across 34 States and 20 Cities, 2013 *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

43. No Data 7.6% - 11.4% 11.5% - 13.3% 13.4% - 15.0% 15.1% - 19.0% Percentage of High School Students Who Did Not Use Any Method to Prevent Pregnancy* *During last sexual intercourse among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

44. Percentage of High School Students Who Drank Alcohol or Used Drugs Before Last Sexual Intercourse,* by Sex, † Grade, and Race/Ethnicity, 2013 *Among the 34.0% of students nationwide who were currently sexually active. † M > F (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

45. Percentage of High School Students Who Drank Alcohol or Used Drugs Before Last Sexual Intercourse,* 1991-2013 † *Among the 34.0% of students nationwide who were currently sexually active. † Increased, 1991-1999, decreased, 1999-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

46. Range and Median Percentage of High School Students Who Drank Alcohol or Used Drugs Before Last Sexual Intercourse,* Across 35 States and 20 Cities, 2013 *Among the 34.0% of students nationwide who were currently sexually active. State and Local Youth Risk Behavior Surveys, 2013

47. No Data 15.3% - 19.0% 19.1% - 20.7% 20.8% - 22.6% 22.7% - 27.7% Percentage of High School Students Who Drank Alcohol or Used Drugs Before Last Sexual Intercourse* *Among the 34.0% of students nationwide who were currently sexually active. State Youth Risk Behavior Surveys, 2013

48. Percentage of High School Students Who Were Ever Taught in School About AIDS or HIV Infection, by Sex, Grade,* and Race/Ethnicity,* 2013 * 10 > 9, 11 > 9, 12 > 9; W > B (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

49. Percentage of High School Students Who Were Ever Taught in School About AIDS or HIV Infection, 1991-2013 * * Increased, 1991-1997, decreased, 1997-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 1991-2013

50. Range and Median Percentage of High School Students Who Were Ever Taught in School About AIDS or HIV Infection, Across 33 States and 20 Cities, 2013 State and Local Youth Risk Behavior Surveys, 2013

51. No Data 73.1% - 80.5% 80.6% - 82.5% 82.6% - 84.7% 84.8% - 87.5% Percentage of High School Students Who Were Ever Taught in School About AIDS or HIV Infection State Youth Risk Behavior Surveys, 2013

52. Percentage of High School Students Who Were Ever Tested for HIV,* by Sex, † Grade, † and Race/Ethnicity, † 2013 *Not including tests done when donating blood. † F > M; 11 > 9, 11 > 10, 12 > 9, 12 > 10; B > H, B > W (Based on t-test analysis, p < 0.05.) Black and White races are non-Hispanic. National Youth Risk Behavior Survey, 2013

53. Percentage of High School Students Who Were Ever Tested for HIV,* 2005-2013 † *Not including tests done when donating blood. † No change 2005-2013 [Based on linear and quadratic trend analyses using logistic regression models controlling for sex, race/ethnicity, and grade (p < 0.05). Significant linear trends (if present) across all available years are described first followed by linear changes in each segment of significant quadratic trends (if present).] National Youth Risk Behavior Surveys, 2005-2013