| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.742 | 6 |
| 2015 | 19.563 | 13 |
| 2014 | 19.025 | 14 |
| 2013 | 18.482 | 15 |
| 2012 | 18.114 | 20 |
| 2011 | 16.609 | 25 |
| 2010 | 20.069 | 17 |
| 2009 | 21.667 | 12 |
| 2008 | 20.583 | 14 |
| 2007 | 21.828 | 16 |
| 2006 | 26.935 | 9 |
| 2005 | 30.571 | 7 |
| 2004 | 31.473 | 9 |
| 2003 | 31.907 | 9 |
| 2002 | 35.517 | 12 |
| 2001 | 37.35 | 9 |
| 2000 | 36.953 | 12 |
| 1999 | 44.008 | 11 |
| 1998 | 48.063 | 12 |
| 1997 | 82.052 | 2 |
| 1996 | 87.91 | 4 |
| 1995 | 134.372 | 4 |
| 1994 | 279.223 | 1 |
| 1993 | 300 | 2 |