Year | Illiterate | Elementary | Junior | High | College and above | ||||
Secondary | Vocational | College | Undergraduate | Graduate | |||||
1997 | 2.1 | 31 | 43.2 | 17.3 | 6.4 | ||||
1998 | 2.1 | 29.3 | 45.4 | 16.8 | 6.4 | ||||
1999 | 2.4 | 27.2 | 46.8 | 17.4 | 6.2 | ||||
2001 | 1.9 | 25.3 | 50 | 16.7 | - | - | 4.2 | 1.8 | 0.1 |
2002 | 1.2 | 20.6 | 50 | 20.2 | - | - | 5.1 | 2.7 | 0.3 |
2003 | 1.5 | 21.9 | 49.3 | 19 | - | - | 5.9 | 2.3 | 0.2 |
2004 | 1.2 | 20.6 | 51.2 | 19.1 | - | - | 5.7 | 2 | 0.22 |
2005 | 1.1 | 18.3 | 51.1 | 21 | - | - | 5.5 | 2.7 | 0.31 |
2006 | 1.2 | 18.1 | 52.9 | 19.5 | - | - | 4.9 | 2.9 | 0.39 |
2007 | 0.8 | 15.8 | 53.6 | 21.3 | - | - | 5.2 | 3 | 0.38 |
2008 | 0.6 | 15.8 | 53 | 21.3 | - | - | 5.5 | 3.5 | 0.35 |
2009 | 0.7 | 16.1 | 52.8 | 21.9 | - | - | 5.4 | 2.7 | 0.34 |
2010 | 0.4 | 12.8 | 53.6 | 22 | - | - | 6.6 | 4.1 | 0.47 |
2011 | 0.5 | 11.6 | 48.2 | 26.3 | - | - | 8.3 | 4.9 | 0.2 |
2012 | 0.7 | 11.2 | 48.4 | 27.6 | - | - | 7.7 | 4.2 | 0.23 |
2013 | 0.3 | 11.1 | 48.9 | 24.8 | - | - | 9.2 | 5.3 | 0.42 |
2014 | 0.3 | 9.4 | 46.9 | 27.2 | - | - | 10.1 | 5.8 | 0.35 |
2015 | 0.4 | 10 | 43.5 | 19.4 | 6.8 | 2.4 | 9.8 | 7 | 0.7 |