| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 3.9 | 81 |
| 2014 | 3.1 | 94 |
| 2013 | 2.6 | 119 |
| 2012 | 3.8 | 89 |
| 2011 | 3.2 | 104 |
| 2010 | 3.6 | 110 |
| 2009 | 5 | 77 |
| 2008 | 1.9 | 119 |
| 2007 | 2.2 | 126 |
| 2006 | 2 | 122 |
| 2005 | 2.1 | 114 |
| 2004 | 1.6 | 122 |
| 2003 | 1.5 | 124 |
| 2002 | 3.4 | 71 |
| 2001 | 1.2 | 130 |
| 2000 | 1.9 | 108 |
| 1999 | 0.4 | 141 |
| 1998 | 0.6 | 136 |
| 1997 | 1.8 | 111 |
| 1991 | 1.3 | 106 |
| 1990 | 1 | 104 |
| 1989 | 0.9 | 107 |
| 1988 | 1.1 | 103 |
| 1987 | 1.2 | 102 |
| 1986 | 0.8 | 104 |