| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.25 | 95 |
| 2015 | 58.22 | 95 |
| 2014 | 58.05 | 95 |
| 2013 | 58.01 | 92 |
| 2012 | 58.46 | 91 |
| 2011 | 59.13 | 80 |
| 2010 | 59.57 | 75 |
| 2009 | 61.4 | 63 |
| 2008 | 63.79 | 52 |
| 2007 | 63.35 | 55 |
| 2006 | 63.68 | 52 |
| 2005 | 62.68 | 53 |
| 2004 | 62.74 | 51 |
| 2003 | 62.02 | 52 |
| 2002 | 63.04 | 48 |
| 2001 | 62.68 | 51 |
| 2000 | 62.81 | 54 |
| 1999 | 62.77 | 52 |
| 1998 | 62.15 | 52 |
| 1997 | 62.2 | 54 |
| 1996 | 60.9 | 59 |
| 1995 | 60.74 | 60 |
| 1994 | 59.3 | 70 |
| 1993 | 60.03 | 66 |
| 1992 | 61.82 | 56 |
| 1991 | 61.85 | 59 |