| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.68 | 93 |
| 2015 | 3.84 | 66 |
| 2014 | 3.28 | 97 |
| 2013 | 1.39 | 144 |
| 2012 | 1.61 | 135 |
| 2011 | 5.02 | 76 |
| 2010 | 3.61 | 109 |
| 2009 | 2.82 | 65 |
| 2008 | 4.25 | 89 |
| 2007 | 7.03 | 68 |
| 2006 | 6.18 | 83 |
| 2005 | 3.49 | 131 |
| 2004 | 5.14 | 96 |
| 2003 | 3.56 | 116 |
| 2002 | 2.04 | 128 |
| 2001 | 1.25 | 152 |
| 2000 | 4.56 | 88 |
| 1999 | 4.64 | 59 |
| 1998 | 4.61 | 73 |
| 1997 | 6.46 | 46 |
| 1996 | 6.06 | 54 |
| 1995 | 6.95 | 37 |
| 1994 | 5.29 | 59 |
| 1993 | 3.74 | 76 |
| 1992 | 2.51 | 83 |
| 1991 | -7.02 | 160 |