Year | Illiterate | Elementary | Junior | High | College and above | |||||
Secondary | Vocational | College | Undergraduate | Graduate | ||||||
1997 | 7.4 | 40.8 | 36 | 12.2 | 3.6 | |||||
1998 | 6.1 | 39.1 | 39.1 | 12 | 3.7 | |||||
1999 | 5.9 | 37.2 | 41.3 | 11.9 | 3.7 | |||||
2001 | 4.8 | 37.5 | 43.2 | 10.1 | - | - | 3.4 | 0.9 | 0.1 | |
2002 | 4.1 | 32.3 | 44.7 | 12.9 | - | - | 4.4 | 1.4 | 0.2 | |
2003 | 4.2 | 33.2 | 43.4 | 12.7 | - | - | 5.2 | 1.2 | 0.1 | |
2004 | 3.1 | 30.8 | 46.6 | 13 | - | - | 4.9 | 1.5 | 0.06 | |
2005 | 3.8 | 26.8 | 49.3 | 13.7 | - | - | 4.5 | 1.8 | 0.16 | |
2006 | 3.3 | 28.2 | 48.9 | 13.5 | - | - | 4.2 | 1.7 | 0.22 | |
2007 | 2 | 25.5 | 51.1 | 13.9 | - | - | 5 | 2.3 | 0.25 | |
2008 | 2.3 | 24.3 | 50.7 | 14.7 | - | - | 5.3 | 2.6 | 0.25 | |
2009 | 2.2 | 23.5 | 51.2 | 16 | - | - | 4.6 | 2.1 | 0.3 | |
2010 | 1.4 | 19.4 | 52.5 | 16.5 | - | - | 6.3 | 3.5 | 0.33 | |
2011 | 1.1 | 17.2 | 50.9 | 19.4 | - | - | 7.3 | 3.8 | 0.37 | |
2012 | 1.2 | 18.6 | 48.9 | 19.1 | - | - | 7.8 | 4 | 0.29 | |
2013 | 1 | 17.8 | 49.9 | 17.9 | - | - | 7.8 | 5.2 | 0.4 | |
2014 | 0.7 | 16 | 49.1 | 19.9 | - | - | 9.1 | 4.9 | 0.41 | |
2015 | 1.5 | 16.5 | 41.5 | 14.8 | 6.2 | 2.1 | 9.9 | 6.9 | 0.5 |