| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11.486 | 9 |
| 2015 | 13.01 | 8 |
| 2014 | 12.1 | 12 |
| 2013 | 10.777 | 15 |
| 2012 | 12.961 | 8 |
| 2011 | 7.898 | 37 |
| 2010 | 10.556 | 16 |
| 2009 | 13.761 | 8 |
| 2008 | 9.949 | 26 |
| 2007 | 8.12 | 40 |
| 2006 | 7.569 | 46 |
| 2005 | 8.571 | 27 |
| 2004 | 7.796 | 38 |
| 2003 | 6.977 | 52 |
| 2002 | 7.927 | 48 |
| 2001 | 10.989 | 31 |
| 2000 | 13.717 | 25 |
| 1999 | 20.7 | 19 |
| 1998 | 22.254 | 18 |
| 1997 | 18.208 | 24 |
| 1996 | 33.633 | 11 |
| 1995 | 70.292 | 6 |
| 1994 | 208.625 | 2 |
| 1993 | 148.633 | 4 |