Longitudinal data on enrollment, weekly student contact hours (WSCH), and average daily attendance for 1967-1977 provide the following findings: (1) an overall ten year enrollment growth of 53.5% for fall and 57.6% for spring semesters; (2) day enrollment increases of 82.7% for fall and 83.6% for spring as compared with evening enrollment increases of 21.6% and 28.8%, respectively; and (3) a summer enrollment growth of 30% since 1972. The first declines in enrollment occurred in 1976-77, with a decline of 7.9% for fall and 4.2% for spring, and WSCH declines of 14.4% and 12.9%. Major factors contributing to decline included expiration of veteran benefits, changes in attendance counting procedures, reduced fiscal incentives due to legislation, a major bus strike in the fall of 1976, and increased employment opportunities. WSCH decline is related to increased numbers of older students and part-time enrollees. The data presented in tables and graphs include enrollments by district college, by semester, ethnic distribution, age distribution, comparative enrollments in other area two- and four-year colleges, WSCH, WSCH per student, and community service non-credit enrollments. Within several of these categories the data are broken down by day and evening, male and female, full-time and part-time, freshmen and sophomores, first-time and continuing, and under 21 and over 21. (RT)