|NOTE: Elementary and secondary enrollment data for school year 2015 (2015–16) are projected. Elementary and secondary expenditure data for school years 2014 and 2015 (2014–15 and 2015–16) are estimated. Postsecondary expenditure data for school year 2015 (2015–16) are estimated.
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, 1965 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," 1981–82 through 2014–15, and "National Public Education Financial Survey," 1987–88 through 2013–14; Private School Universe Survey (PSS), 1989–90 through 2013–14; National Elementary and Secondary Enrollment Projection Model, 1972 through 2026; Higher Education General Information Survey (HEGIS), "Fall Enrollment
in Institutions of Higher Education" and "Financial Statistics of Institutions of Higher Education" surveys, 1965–66 through 1985–86; Integrated Postsecondary Education Data System (IPEDS), "Fall Enrollment Survey" (IPEDS-EF:86–99) and "Finance Survey" (IPEDS-F:FY87–99); and IPEDS Spring 2001 through Spring 2016, Fall Enrollment and Finance components. U.S. Department of Commerce, Bureau of Economic Analysis, National Income and Product Accounts Tables, retrieved May 6, 2017, from http://www.bea.gov/iTable/index_nipa.cfm.