—Not available.

1 Regular districts exclude regional education service agencies and supervisory union administrative centers, state-operated agencies, federally operated agencies, and other types of local education agencies, such as independent charter schools.

2 Schools with both elementary and secondary programs are included under elementary schools and also under secondary schools.

3 Data for most years prior to 1976-77 are partly estimated. Prior to 1995-96, excludes schools with highest grade of kindergarten.

4 Includes regular schools and special schools not classified by grade span.

5 Includes elementary, secondary, and combined elementary/secondary schools.

6 These data cannot be compared directly with the data for years after 1980-81.

7 Because of expanded survey coverage, data are not directly comparable with figures after 1983-84.