| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 36.49 | 1 |
| 2015 | 58.51 | 2 |
| 2014 | 44.55 | 1 |
| 2013 | 27.88 | 4 |
| 2012 | 28.51 | 9 |
| 2011 | 38.68 | 4 |
| 2010 | 36.17 | 4 |
| 2009 | 25.36 | 3 |
| 2008 | 30.57 | 6 |
| 2007 | 29.36 | 6 |
| 2006 | 23.2 | 9 |
| 2005 | 22.56 | 6 |
| 2004 | 13.12 | 9 |
| 2003 | 11.51 | 16 |
| 2002 | 4.06 | 57 |
| 2001 | 18.47 | 7 |
| 2000 | 41.07 | 2 |
| 1999 | 14.83 | 11 |
| 1998 | 8.74 | 21 |