| 2008 | 120 | -6.8% | 38.6 | 3.0:1 |
| 2007 | 128.2 | 0.8% | 36.1 | 3.5:1 |
| 2006 | 127.12 | 8.4% | 34.2 | 3.2:1 |
| 2005 | 117.2 | 24% | 31 | 3.6:1 |
| 2004 | 94.5 | 18.5% | 27.3 | 2.9:1 |
| 2003 | 79.7 | 27.7% | 22 | 2.9:1 |
| 2002 | 62.4 | 35.7% | 16.4 | 3.2:1 |
| 2001 | 46 | 17.3% | 13.3 | 4.2:1 |
| 2000 | 39.2 | 22.9% | 10.3 | 4.6:1 |
| 1999 | 31.9 | 16.4% | 7.2 | 4.9:1 |