| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.35 | 91 |
| 2015 | 63.48 | 90 |
| 2014 | 63.44 | 90 |
| 2013 | 63.42 | 90 |
| 2012 | 63.49 | 93 |
| 2011 | 63.39 | 91 |
| 2010 | 62.98 | 94 |
| 2009 | 63.21 | 93 |
| 2008 | 63.26 | 95 |
| 2007 | 62.94 | 96 |
| 2006 | 62.07 | 100 |
| 2005 | 61.85 | 99 |
| 2004 | 61.39 | 98 |
| 2003 | 60.83 | 103 |
| 2002 | 59.89 | 114 |
| 2001 | 59.31 | 119 |
| 2000 | 60.63 | 106 |
| 1999 | 60.64 | 106 |
| 1998 | 56.92 | 136 |
| 1997 | 57.89 | 133 |
| 1996 | 59.37 | 119 |
| 1995 | 60.52 | 105 |
| 1994 | 60.72 | 103 |
| 1993 | 63 | 84 |
| 1992 | 65.06 | 72 |
| 1991 | 66.16 | 62 |
| 1990 | 67.18 | 53 |