This booklet presents data on years of schooling completed by individuals who are 15 years old and older. Data are presented in tabular and narrative form. Characteristics considered in the survey include age, sex, race, Spanish origin, type of residence, region of residence, occupations, marital status, and education of spouse. Findings indicate that 70 percent of persons 25 years old and older were high school graduates in March of 1980 and the proportion who completed 4 or more years of college rose from 6 to 17 percent from 1950 to 1981. Although the proportion of men who completed 4 years of college grew more than that for women, the closeness of the 1981 figures show a recent trend toward convergence of attainment levels for men and women. The number of persons who completed high school and attended colleges increased proportionately more for blacks than whites--although white youths were still more likely than black youths to be high school graduates. Whereas the proportion of persons who were high school graduates was substantially greater for younger (25-34 year olds) than older (45-50 year olds) in the Northwest, Midwest, and South, the advantage the West seemed to have had in educational attainment appears to be disappearing as younger cohorts in other regions have been catching up. The bulk of the report contains tables of statistics that document these and other trends, definitions and explanations, and sources and reliability of the estimates. (LH)