| Father’s school level | Year | |||||||
| 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 | 2012 | |
| Never attended school | 0.5 | 2.2 | 1.6 | 1.1 | 1.4 | 1.2 | 0.8 | 1.4 |
| Elementary school incomplete | 2,6 | 4.5 | 6.1 | 5.7 | 5.9 | 5.9 | 4.3 | 6.9 |
| Elementary school complete | 1.1 | 3.8 | 4.8 | 2.8 | 2.6 | 4.3 | 4.6 | 4.4 |
| Middle school incomplete | 3.0 | 5.6 | 5.6 | 4.1 | 4.8 | 4.8 | 4.5 | 5.2 |
| Middle school complete | 3.0 | 4.1 | 3.2 | 2.8 | 3.4 | 3.1 | 1.7 | 2.0 |
| High school incomplete | 2.9 | 4.6 | 4.9 | 4.4 | 4.0 | 3.6 | 4.7 | 4.2 |
| High school complete | 28.0 | 29.9 | 26.5 | 25.2 | 28.6 | 27.3 | 27.3 | 25.6 |
| Higher education incomplete | 8.8 | 9.1 | 8.1 | 10.7 | 8.1 | 8.0 | 8.3 | 8.0 |
| Higher education complete | 49.9 | 36.1 | 39.1 | 43.1 | 41.2 | 41.9 | 43.8 | 42.4 |
| Total | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |