| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.06 | 24 |
| 2015 | 4.66 | 20 |
| 2014 | 3.59 | 24 |
| 2013 | 4.19 | 40 |
| 2012 | 4.7 | 38 |
| 2011 | 4.01 | 44 |
| 2010 | -1.37 | 140 |
| 2009 | -15.09 | 156 |
| 2008 | -4.64 | 146 |
| 2007 | 9.47 | 24 |
| 2006 | 13.32 | 14 |
| 2005 | 9.9 | 22 |
| 2004 | 8.39 | 24 |
| 2003 | 9.83 | 15 |
| 2002 | 10.14 | 13 |
| 2001 | 7.19 | 17 |
| 2000 | 6.72 | 20 |
| 1999 | 0.6 | 87 |
| 1998 | 6.22 | 23 |
| 1997 | 13.75 | 5 |
| 1996 | 15.17 | 6 |
| 1995 | 6.97 | 25 |
| 1994 | 3.05 | 39 |