| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.54 | 65 |
| 2015 | 3.89 | 31 |
| 2014 | 2.19 | 87 |
| 2013 | 3.62 | 51 |
| 2012 | 0.17 | 143 |
| 2011 | 1.82 | 118 |
| 2010 | 1.43 | 133 |
| 2009 | -2.43 | 116 |
| 2008 | 5.77 | 33 |
| 2007 | 5.88 | 60 |
| 2006 | 5.44 | 64 |
| 2005 | 8.75 | 19 |
| 2004 | 6.04 | 50 |
| 2003 | 3.91 | 67 |
| 2002 | 5.17 | 32 |
| 2001 | 4.27 | 39 |
| 2000 | 5.29 | 43 |
| 1999 | 9.35 | 10 |
| 1998 | 15.66 | 4 |
| 1997 | 35.39 | 3 |
| 1996 | 92.12 | 1 |
| 1995 | 24.1 | 2 |