| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 13.233 | 34 |
| 2015 | 12.923 | 42 |
| 2014 | 10.773 | 62 |
| 2013 | 8.723 | 88 |
| 2012 | 8.934 | 88 |
| 2011 | 11.61 | 55 |
| 2010 | 17.482 | 23 |
| 2009 | 17.329 | 28 |
| 2008 | 17.811 | 28 |
| 2007 | 23.083 | 12 |
| 2006 | 26.367 | 10 |
| 2005 | 22.25 | 18 |
| 2004 | 48 | 4 |
| 2003 | 44.208 | 7 |
| 2002 | 34.167 | 14 |
| 2001 | 34 | 13 |
| 2000 | 31.417 | 17 |
| 1999 | 28.75 | 25 |
| 1998 | 30 | 28 |
| 1997 | 27.167 | 29 |
| 1996 | 38.25 | 19 |
| 1995 | 24.75 | 36 |