| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.75 | 85 |
| 2015 | 1.75 | 103 |
| 2014 | 1.75 | 116 |
| 2013 | 1.75 | 119 |
| 2012 | 1.75 | 127 |
| 2011 | 1.75 | 130 |
| 2010 | 1.75 | 127 |
| 2009 | 1.875 | 135 |
| 2008 | 2.5 | 138 |
| 2007 | 2.5 | 148 |
| 2006 | 2.5 | 140 |
| 2005 | 3 | 111 |
| 2004 | 3.5 | 95 |
| 2003 | 3.5 | 99 |
| 2002 | 3.167 | 112 |
| 2001 | 3 | 128 |
| 2000 | 3 | 133 |
| 1999 | 11.417 | 43 |
| 1988 | 6.5 | 72 |
| 1987 | 6.5 | 69 |
| 1986 | 7.5 | 61 |