| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 5.1 | 33 |
| 2015 | 4.4 | 67 |
| 2014 | 2.9 | 99 |
| 2013 | 4.5 | 68 |
| 2012 | 3.7 | 93 |
| 2011 | 4.1 | 75 |
| 2010 | 4.4 | 86 |
| 2009 | 5.4 | 65 |
| 2008 | 3.1 | 82 |
| 2007 | 4.6 | 58 |
| 2006 | 4.2 | 61 |
| 2005 | 3.2 | 74 |
| 2004 | 3.3 | 81 |
| 2003 | 3.8 | 71 |
| 2002 | 4.1 | 61 |
| 2001 | 3.5 | 61 |
| 2000 | 3.7 | 55 |
| 1999 | 3.9 | 55 |
| 1998 | 3.4 | 58 |
| 1997 | 2.8 | 74 |
| 1996 | 2.1 | 90 |
| 1995 | 1.7 | 101 |
| 1994 | 1 | 122 |
| 1993 | 0.5 | 130 |