| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.52 | 39 |
| 2015 | 15.65 | 4 |
| 2014 | 8.64 | 18 |
| 2013 | 6.96 | 33 |
| 2012 | 16.69 | 9 |
| 2011 | 1.5 | 89 |
| 2010 | -1.74 | 137 |
| 2009 | -2.65 | 146 |
| 2008 | 10.71 | 23 |
| 2007 | 27.35 | 7 |
| 2006 | 4.48 | 73 |
| 2005 | -16.19 | 144 |
| 2004 | 13.66 | 13 |
| 2003 | -28.07 | 145 |
| 2002 | 12.36 | 17 |
| 2001 | 6.64 | 36 |
| 2000 | 2.15 | 78 |
| 1999 | 13.17 | 14 |
| 1998 | -4.04 | 120 |
| 1997 | 2.71 | 67 |