Because most elementary enrollment rates have been close to 100 percent from 1972 to 1994, alternative enrollment rate projections were not computed. Several of the rates in table A1.1 exceed 100 percent, as a result of several factors. The enrollment data by age were prorated to agree with NCES totals. The Bureau of the Census does not revise enrollment estimates by age, but population estimates are revised regularly. Secondary Grades 9-12 Projections of secondary enrollment rates were considered for ages 12 through 34.
Secondary enrollments are negligible for the remaining ages.
Secondary enrollment rates have fluctuated within a narrow range from 1972 to 1994. Therefore, alternative enrollment rate projections were not calculated. College enrollment is negligible for earlier ages. Three alternative projections were made using various assumptions. Table A1.3 shows enrollment rates for 1994 and low, middle, and high alternative projected enrollment rates for 2002 and 2007.