| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.12 | 70 |
| 2015 | 1.39 | 94 |
| 2014 | 2.08 | 96 |
| 2013 | 7.69 | 24 |
| 2012 | 7.33 | 38 |
| 2011 | 11.14 | 24 |
| 2010 | 6.14 | 51 |
| 2009 | 8.12 | 30 |
| 2008 | 12.41 | 48 |
| 2007 | 6.39 | 71 |
| 2006 | 11.72 | 18 |
| 2005 | 16.12 | 10 |
| 2004 | 11.03 | 27 |
| 2003 | 9.88 | 34 |
| 2002 | 19.49 | 12 |
| 2001 | 95.01 | 3 |
| 2000 | 71.12 | 5 |
| 1999 | 42.45 | 12 |
| 1998 | 30.16 | 13 |
| 1997 | 23.31 | 20 |
| 1996 | 95.6 | 6 |
| 1995 | 82.66 | 14 |