| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 0.2 | 128 |
| 2015 | 0.2 | 130 |
| 2014 | 0.4 | 131 |
| 2013 | 0.4 | 132 |
| 2012 | 0.4 | 133 |
| 2011 | 0.9 | 125 |
| 2010 | 0.9 | 121 |
| 2009 | 2.4 | 105 |
| 2008 | 2.9 | 104 |
| 2007 | 2.9 | 105 |
| 2006 | 2.9 | 103 |
| 2005 | 2.8 | 103 |
| 2004 | 2.7 | 111 |
| 2003 | 4.5 | 107 |
| 2002 | 4.5 | 109 |
| 2001 | 2 | 125 |
| 2000 | 2 | 126 |
| 1999 | 2.9 | 121 |
| 1998 | 8.7 | 112 |
| 1997 | 1.1 | 131 |
| 1996 | 1.8 | 125 |
| 1995 | 1.9 | 124 |
| 1994 | 1.8 | 127 |