U.S. K-12 Dropout and Completion Rates reports dropouts and completion
rates for all U.S. school agencies, commonly called districts. Data are
based on survey data from the U.S. Department of Education and reflect
October 1st in the first year of a traditional academic year, i.e., data
reported for 2007 reflect 2007-2008 data. Data prior to 2006-07 exclude
some categories and are reported as NA. For more information, see the
National Center for Education Statistics.