| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 62.39 | 14 |
| 2015 | 63.27 | 14 |
| 2014 | 63.13 | 15 |
| 2013 | 63.71 | 14 |
| 2012 | 64.05 | 11 |
| 2011 | 65.04 | 11 |
| 2010 | 67.37 | 9 |
| 2009 | 65.46 | 13 |
| 2008 | 62.96 | 17 |
| 2007 | 60.13 | 20 |
| 2006 | 54.58 | 30 |
| 2005 | 50.89 | 40 |
| 2004 | 47.56 | 49 |
| 2003 | 45.1 | 54 |
| 2002 | 41.12 | 77 |
| 2001 | 37.29 | 104 |
| 2000 | 41.05 | 83 |
| 1999 | 45.49 | 59 |
| 1998 | 47.06 | 52 |
| 1997 | 45.14 | 65 |
| 1996 | 55.19 | 31 |
| 1995 | 58.04 | 24 |
| 1994 | 57.93 | 25 |
| 1993 | 57.08 | 25 |
| 1992 | 55.66 | 29 |
| 1991 | 54.35 | 36 |