| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.42 | 14 |
| 2015 | 15.11 | 36 |
| 2014 | 29.64 | 6 |
| 2013 | 16 | 43 |
| 2012 | 39.41 | 4 |
| 2011 | 3.94 | 132 |
| 2010 | 21.3 | 38 |
| 2009 | 35.58 | 7 |
| 2008 | 5.45 | 136 |
| 2007 | 61.84 | 5 |
| 2006 | 40.55 | 16 |
| 2005 | 15.82 | 75 |
| 2004 | 28.35 | 28 |
| 2003 | 15.43 | 63 |
| 2002 | 31.09 | 23 |
| 2001 | 20.52 | 59 |
| 2000 | 26.9 | 37 |
| 1999 | 17.27 | 57 |
| 1998 | 15.73 | 48 |
| 1997 | 16.59 | 77 |
| 1996 | 40.44 | 17 |
| 1995 | 43.59 | 21 |
| 1994 | 35.56 | 41 |