NOTE: Expenditure data for school year 2014 (2014–15) are projected.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Statistics of State School Systems, 1959–60 through 1969–70; Statistics of Public Elementary and Secondary Day Schools, 1959–60 through 1980–81; Revenues and Expenditures for Public Elementary and Secondary Education, 1970–71 through 1980–81; Common Core of Data (CCD), "State Nonfiscal Survey of Public Elementary/Secondary Education," 1981–82 through 2014–15; "National Public Education Financial Survey," 1989–90 through 2013–14; and Public Elementary and Secondary Education Current Expenditure Projection Model, 1973–74 through 2026–27.
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