High school students not graduating on time

Definitions: The estimated percentage of an entering freshman class not graduating in 4 years.For data through 2010-2011:

The measure is derived from the Averaged Freshman Graduation Rate (AFGR), which uses aggregate student enrollment data to estimate the size of an incoming freshman class and aggregate counts of the number of regular diplomas awarded four years later.
For data starting in 2013-2014:
The methodology is devised by the Idaho State Department of Education.

Data Source: For data through 2010-2011:

Population Reference Bureau, analysis of data from the U.S. Department of Education.U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), State Dropout and Completion Data, accessible online at http://nces.ed.gov/ccd/drpcompstatelvl.asp.
For data starting in 2013-2014:
http://www.sde.idaho.gov/communications/frequently-requested-data.html

Footnotes: Updated April 2017.

Definitions: The estimated percentage of an entering freshman class not graduating in 4 years.For data through 2010-2011:

The measure is derived from the Averaged Freshman Graduation Rate (AFGR), which uses aggregate student enrollment data to estimate the size of an incoming freshman class and aggregate counts of the number of regular diplomas awarded four years later.
For data starting in 2013-2014:
The methodology is devised by the Idaho State Department of Education.

Data Source: For data through 2010-2011:

Population Reference Bureau, analysis of data from the U.S. Department of Education.U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), State Dropout and Completion Data, accessible online at http://nces.ed.gov/ccd/drpcompstatelvl.asp.
For data starting in 2013-2014:
http://www.sde.idaho.gov/communications/frequently-requested-data.html

Footnotes: Updated April 2017.