| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.113 | 107 |
| 2015 | 1.888 | 99 |
| 2014 | 3.02 | 73 |
| 2013 | 4.551 | 58 |
| 2012 | 5.505 | 55 |
| 2011 | 6.298 | 49 |
| 2010 | 7.313 | 41 |
| 2009 | 11.987 | 14 |
| 2008 | 9.513 | 29 |
| 2007 | 6.7 | 59 |
| 2006 | 4.768 | 76 |
| 2005 | 6.415 | 53 |
| 2004 | 11.538 | 17 |
| 2003 | 11.024 | 23 |
| 2002 | 19.233 | 10 |
| 2001 | 26.867 | 6 |
| 2000 | 33.108 | 7 |
| 1999 | 45.867 | 2 |
| 1998 | 37.275 | 7 |
| 1997 | 55.833 | 2 |
| 1996 | 37.26 | 9 |
| 1995 | 44.725 | 10 |
| 1994 | 57 | 7 |