| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 10.39 | 9 |
| 2015 | 2.36 | 87 |
| 2014 | 2.44 | 98 |
| 2013 | 4.86 | 60 |
| 2012 | 4.35 | 59 |
| 2011 | 2.99 | 110 |
| 2010 | 4.07 | 99 |
| 2009 | -1.91 | 85 |
| 2008 | 6.58 | 48 |
| 2007 | -.91 | 143 |
| 2006 | 4.43 | 98 |
| 2005 | 0.63 | 143 |
| 2004 | 3.3 | 110 |
| 2003 | 5.22 | 72 |
| 2002 | -1.47 | 135 |
| 2001 | -8 | 150 |
| 2000 | -.05 | 132 |
| 1999 | -1.12 | 131 |
| 1998 | -1.34 | 134 |
| 1997 | 5.16 | 71 |
| 1996 | 3.57 | 79 |
| 1995 | 7.49 | 37 |
| 1994 | 6.52 | 45 |
| 1993 | 5.45 | 40 |
| 1992 | -1.89 | 96 |