| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 6.734 | 19 |
| 2015 | 5.179 | 43 |
| 2014 | -1.1 | 166 |
| 2013 | -1.333 | 168 |
| 2012 | 1.799 | 129 |
| 2011 | 5.788 | 62 |
| 2010 | 0.169 | 158 |
| 2009 | 1.5 | 84 |
| 2008 | 3.093 | 112 |
| 2007 | 3.137 | 141 |
| 2006 | 4.52 | 113 |
| 2005 | 3.669 | 117 |
| 2004 | 6.44 | 70 |
| 2003 | 6.103 | 49 |
| 2002 | 5.52 | 57 |
| 2001 | 7.793 | 19 |
| 2000 | 6.586 | 37 |
| 1999 | 4.134 | 69 |
| 1998 | 11.109 | 8 |
| 1997 | 5.735 | 53 |
| 1996 | 10.852 | 9 |
| 1995 | 6.463 | 27 |