Figure 9.

Total and full-day preprimary enrollment of 3- to 5-year-olds: October 1970 through October 2015

NOTE: Data prior to 1994 may not be comparable to later years. SOURCE: U.S. Department of Education, National Center for Education Statistics, Preprimary Enrollment, 1970 and 1975; U.S. Department of Commerce, Census Bureau, Current Population Survey (CPS), October 1976 through October 2015.