| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 61.07 | 34 |
| 2015 | 61.12 | 35 |
| 2014 | 61.03 | 35 |
| 2013 | 60.89 | 36 |
| 2012 | 60.79 | 37 |
| 2011 | 59.87 | 36 |
| 2010 | 57.74 | 41 |
| 2009 | 60.24 | 38 |
| 2008 | 60.05 | 39 |
| 2007 | 57.89 | 46 |
| 2006 | 57.36 | 44 |
| 2005 | 56.8 | 44 |
| 2004 | 57.21 | 41 |
| 2003 | 55.99 | 45 |
| 2002 | 55.66 | 46 |
| 2001 | 55.63 | 47 |
| 2000 | 55.53 | 44 |
| 1999 | 56.13 | 41 |
| 1998 | 57.42 | 35 |
| 1997 | 57.97 | 35 |
| 1996 | 53.79 | 43 |
| 1995 | 52.4 | 52 |
| 1994 | 51.71 | 54 |
| 1993 | 48.96 | 67 |
| 1992 | 48.15 | 73 |
| 1991 | 47.32 | 80 |