1. 28a. Percentage of employees having a high school diploma or higher education, by industry, (All types of employment)

2. 28b. Distribution of educational attainment in construction, Hispanic and Non-Hispanic workers, (All types of employment)

3. 28c. Distribution of educational attainment in construction, by union status, (Production workers)

4. 28d. Access to a personal computer and the Internet among construction workers, (Wage-and-salary workers)