Comparative statistics on course attrition in the Maricopa County Community College District are presented for Fall 1971 through Fall 1980. After plotting high point enrollment (final number of students enrolled in a course plus withdrawals and audits), end of semester enrollment (the final number of students enrolled in a course), and percentage of attrition for Fall 1971 through Fall 1980, the report compares Fall 1980 and Fall 1971 data, where available, in each of 127 program areas. An analysis of the data, which are presented on a series of graphs and tables, indicates that: (1) on an average, 21% of the students who enrolled in a course during the ten-year period withdrew or audited the course; (2) this average has varied between 16% (in 1972) to 24% (in 1978 and 1979); (3) both high point enrollment and end of semester enrollment correlate positively with attrition rate; (4) among the curriculum areas, attrition rates varied from 0% to 50% during the semester; (5) no relationship was revealed between enrollment and attrition rates in the curriculum areas; (6) curriculum areas with very low attrition rates in 1980-81 were Stone Masonry (0%), Dental Hygiene (0%), Machinists (0%), Professional Growth (0%), and Plastering-Cement (1%); and (7) courses with especially high attrition rates in 1980-81 were in the areas of Arabic (52%), Assessment and Advisement (45%), Hebrew (40%), Italian (40%), and Accounting (36%). (AYC)