| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 61.23 | 63 |
| 2015 | 61.11 | 64 |
| 2014 | 60.97 | 66 |
| 2013 | 60.69 | 70 |
| 2012 | 60.43 | 71 |
| 2011 | 59.97 | 74 |
| 2010 | 59.49 | 76 |
| 2009 | 59.32 | 76 |
| 2008 | 59.29 | 84 |
| 2007 | 58.88 | 88 |
| 2006 | 58.57 | 86 |
| 2005 | 58.45 | 84 |
| 2004 | 58.34 | 80 |
| 2003 | 58.4 | 79 |
| 2002 | 58.39 | 80 |
| 2001 | 58.61 | 82 |
| 2000 | 58.63 | 75 |
| 1999 | 58.56 | 76 |
| 1998 | 58.81 | 76 |
| 1997 | 58.78 | 80 |
| 1996 | 59.07 | 76 |
| 1995 | 59.68 | 71 |
| 1994 | 59.71 | 67 |
| 1993 | 59.68 | 67 |
| 1992 | 59.51 | 70 |
| 1991 | 59.35 | 72 |