| 1 | 1998 | 502.0 | | | | | | | | | | |
| 2 | 1999 | 556.1 | | | | | | | | | | |
| 3 | 2000 | 529.1 | | | | | | | | | | |
| 4 | 2001 | 491.0 | | | | | | | | | | |
| 5 | 2002 | 462.2 | | | | | | | | | | |
| 6 | 2003 | 545.1 | | | | | | | | | | |
| 7 | 2004 | 549.1 | | | | | | | | | | |
| 8 | 2005 | 516.1 | | | | | | | | | | |
| 9 | 2006 | 513.1 | | | | | | | | | | |
| 10 | 2007 | 497.0 | 0.09 | -22.07 | 1.15 | -0.74 | -1.99 | -1.99 | -5.15 | | | |
| 11 | 2008 | 484.1 | 0.35 | -0.35 | -0.67 | -0.07 | 0.07 | -0.28 | -0.37 | | | 0.00 |
| 12 | 2009 | 457.1 | 0.41 | 0.64 | -0.81 | 0.21 | 0.27 | -0.48 | -0.43 | | | |
| 13 | 2010 | 454.0 | 0.47 | 0.25 | -1.13 | 0.11 | -0.16 | -0.17 | -0.29 | | | |
| 14 | 2011 | 391.0 | 0.24 | 0.11 | -0.22 | 0.13 | -0.18 | -0.03 | -0.23 | | | |