Go to the Census Bureau Web site ( http://www.census.gov ) and in sequence select

“E” in the Subjects area, “Educational Attainment,” and “Table A.3” under Historical Tables to find information about earnings of workers by education.

What were the annual earnings for high school and college graduates in 1975? For the most recent year shown? What was the ratio of the earnings of college graduates to high school graduates in 1975? In the most recent year? Has the ratio increased or decreased over this period? What factors might help explain this change?