| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.27 | 71 |
| 2015 | 4.33 | 24 |
| 2014 | 2.61 | 75 |
| 2013 | -.52 | 161 |
| 2012 | -.94 | 160 |
| 2011 | 1.79 | 119 |
| 2010 | 2 | 113 |
| 2009 | -5.38 | 161 |
| 2008 | 1.86 | 109 |
| 2007 | 4.92 | 83 |
| 2006 | 6.59 | 47 |
| 2005 | 6.3 | 39 |
| 2004 | 4.92 | 66 |
| 2003 | 3.63 | 74 |
| 2002 | 1.84 | 91 |
| 2001 | 3.44 | 49 |
| 2000 | 4.59 | 53 |
| 1999 | 1.54 | 105 |
| 1998 | -.22 | 153 |
| 1997 | -.57 | 164 |
| 1996 | 4.4 | 57 |
| 1995 | 6.29 | 27 |
| 1994 | 2.87 | 70 |
| 1993 | -.04 | 99 |
| 1992 | -.61 | 107 |
| 1991 | -11.4 | 168 |