Part of the continuing reports of data analysis of school and college enrollment, this report focuses on changes in college enrollment as affected by: family income; the changing size of the armed forces; the means of obtaining a high school diploma; and the type of degree being sought by college students. Following a brief narrative, the report consists primarily of tables and graphs of the statistical data. Several conclusions are drawn from the data: (1) recent changes in the education benefits of the GI bill lowered the level of college enrollment in the fall of 1976; (2) young adults from high income families are still more likely to attend college than are those from low income families; (3) about 95% of 1975 high school graduates received their diplomas upon graduation with their high school class; and (4) 10% of undergraduates in the first three years of college were reported to be attending college for purposes other than to obtain a college degree. (Author/JR)