This database contains average daily attendance in public elementary and secondary schools. Years reflect the first year of a traditional academic calendar, i.e., from the fall of one year to late spring of the following year.  Figures for California for 1989-90 and earlier years are not strictly comparable with those for other states because California's attendance figures included excused absences.  Also, The 2009 figure for California excludes average daily attendance for regional occupational programs and summer school programs that were reported in prior years.  Data for many years prior to 1989 are not available and are indicated with NA.