|Figure 30-1: Percentage distribution of staff employed in public schools, by school level: School years 1999-2000 and 2007-08|
1 Consists of principals, teachers, instructional coordinators and supervisors, librarians/library media specialists, and school counselors.
2 Consists of nurses, social workers and psychologists, speech therapists, and other professional staff.
3 Consists of special needs and other aides.
4 Consists of secretaries and other support staff; food service personnel; custodial, maintenance, and security personnel; and other employees not reported separately above.
NOTE: Detail may not sum to totals because of rounding. For more information on the Schools and Staffing Survey (SASS), see supplemental note 3.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), "Public School Data File," 1999–2000 and 2007–08 and "Public Charter School Data File," 1999–2000.