| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 6.5 | 35 |
| 2014 | 5.4 | 44 |
| 2013 | 6.5 | 36 |
| 2012 | 7.1 | 31 |
| 2011 | 6.4 | 35 |
| 2010 | 5.4 | 58 |
| 2009 | 3.4 | 114 |
| 2008 | 3.7 | 62 |
| 2007 | 3.9 | 73 |
| 2006 | 4.6 | 55 |
| 2005 | 2 | 119 |
| 2004 | 1.3 | 131 |
| 2003 | 0.7 | 138 |
| 2002 | 0.5 | 142 |
| 2001 | 1.1 | 131 |
| 2000 | 1.9 | 105 |
| 1999 | 0.8 | 137 |
| 1998 | 0.4 | 140 |
| 1997 | 0.8 | 138 |
| 1996 | 1.1 | 127 |
| 1995 | 0.6 | 137 |