| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.82 | 36 |
| 2015 | 3.94 | 62 |
| 2014 | 3.08 | 102 |
| 2013 | 3.53 | 88 |
| 2012 | 0.64 | 149 |
| 2011 | 1.06 | 160 |
| 2010 | -.8 | 180 |
| 2009 | -7.07 | 187 |
| 2008 | 8.46 | 23 |
| 2007 | 6.86 | 72 |
| 2006 | 8.06 | 45 |
| 2005 | 4.17 | 116 |
| 2004 | 8.36 | 33 |
| 2003 | 5.52 | 71 |
| 2002 | 5.18 | 52 |
| 2001 | 5.59 | 38 |
| 2000 | 2.4 | 147 |
| 1999 | -.4 | 160 |
| 1998 | -2.09 | 178 |
| 1997 | -4.82 | 187 |
| 1996 | 3.87 | 105 |
| 1995 | 7.14 | 29 |
| 1994 | 3.93 | 86 |
| 1993 | 1.53 | 106 |
| 1992 | -8.77 | 162 |
| 1991 | -12.92 | 172 |