| 1999-2007 | 1999-2008 | 2009-2013 | 1999-2013 | ||||
| Coeff. | t | Coeff. | t | Coeff. | t | Coeff. | t |
| 0.149 | 5.444 | 0.131 | 6.344 | 0.278 | 11.28 | 0.162 | 9.592 |
| 0.219 | 0.254 | 0.683 | 0.341 |