| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.237 | 10 |
| 2015 | 21.823 | 9 |
| 2014 | 17.718 | 18 |
| 2013 | 16.649 | 24 |
| 2012 | 18.392 | 16 |
| 2011 | 15.947 | 29 |
| 2010 | 15.868 | 31 |
| 2009 | 20.863 | 15 |
| 2008 | 17.493 | 29 |
| 2007 | 13.899 | 55 |
| 2006 | 15.169 | 51 |
| 2005 | 16.174 | 45 |
| 2004 | 17.401 | 41 |
| 2003 | 17.895 | 41 |
| 2002 | 25.349 | 19 |
| 2001 | 32.278 | 14 |
| 2000 | 41.528 | 9 |
| 1999 | 54.953 | 6 |
| 1998 | 54.497 | 7 |
| 1997 | 49.117 | 13 |
| 1996 | 79.883 | 6 |
| 1995 | 122.7 | 5 |
| 1994 | 250.283 | 2 |
| 1993 | 184.25 | 3 |