| Share of total expenditure | 2005-2006 | 2006-2007 | 2007-2008 | 2008-2009 | 2009-2010 | 2010-2011 | 2011-2012 |
| Revenue expenses/Total expenses | 82% | 83% | 84% | 72% | 64% | 63% | 54% |
| Capital expenses/Total expenses | 18% | 17% | 16% | 28% | 36% | 37% | 46% |