| Year | Corruption index | Countries | Absolute rank | Relate rank | Serious honesty |
| 2006 | 3.3 | 163 | 70 | 42.94% | ―― |
| 2007 | 3.5 | 179 | 72 | 40.22% | ―― |
| 2008 | 3.6 | 180 | 72 | 40.00% | 6 |
| 2009 | 3.6 | 180 | 79 | 43.89% | 6 |
| 2010 | 3.5 | 178 | 78 | 43.82% | 3 |
| 2011 | 3.6 | 183 | 75 | 40.98% | 5 |
| 2012 | 39 | 176 | 80 | 45.45% | 5 |
| 2013 | 40 | 177 | 80 | 45.20% | 3 |
| 2014 | 36 | 175 | 100 | 57.14% | 2 |
| 2015 | 37 | 167 | 83 | 49.70% | 6 |
| 2016 | 40 | 176 | 79 | 44.89% | 5 |