Figure 2.

Enrollment, total expenditures in constant dollars, and expenditures as a percentage of the gross domestic product (GDP), by level of education: Selected years, 1965–66 through 2007–08

NOTE: Expenditure data for school years 2006 and 2007 (2006–07 and 2007–08) are estimated. Enrollment data for school year 2007–08 for elementary and secondary are projected. SOURCE: U.S. Department of Education, National Center for Education Statistics, Statistics of State School Systems, 1965–66 through 1969–70; Statistics of Public Elementary and Secondary School Systems, 1970 through 1980; Revenues and Expenditures for Public Elementary and Secondary Education, 1970–71 through 1986–87; Common Core of Data (CCD), “State Nonfiscal Survey of Public Elementary and Secondary Education,” 1985–86 through 2005–06; “National Public Education Financial Survey,” 1987–88 through 2005–06; Statistics of Nonpublic Elementary and Secondary Schools, 1970–71 through 1979–80; Private School Universe Survey (PSS), 1989–90 through 2005–06; Higher Education General Information Survey (HEGIS), Fall Enrollment in Institutions of Higher Education, 1965–66 through 1985–86; Financial Statistics of Institutions of Higher Education, 1965–66 through 1985–86; 1986–87 through 2006–07 Integrated Postsecondary Education Data System (IPEDS), “Finance Survey,” (IPEDS-FY87–89), and Spring 2001 through Spring 2007; and U.S. Department of Commerce, Bureau of Economic Analysis, retrieved August 12, 2008, from http://www.bea.gov/national/index.htm