| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 68.59 | 91 |
| 2015 | 67.91 | 91 |
| 2014 | 67.2 | 95 |
| 2013 | 65.22 | 113 |
| 2012 | 66.06 | 106 |
| 2011 | 64.42 | 120 |
| 2010 | 61.94 | 139 |
| 2009 | 61.35 | 143 |
| 2008 | 61.91 | 144 |
| 2007 | 63.65 | 136 |
| 2006 | 62.34 | 142 |
| 2005 | 62.42 | 136 |
| 2004 | 63.43 | 128 |
| 2003 | 66.21 | 106 |
| 2002 | 63.46 | 128 |
| 2001 | 66.87 | 108 |
| 2000 | 65.73 | 115 |
| 1999 | 63.73 | 135 |
| 1998 | 63.79 | 132 |
| 1997 | 65.07 | 122 |
| 1996 | 65.04 | 121 |
| 1995 | 66.84 | 113 |
| 1994 | 65.26 | 123 |
| 1993 | 65.86 | 121 |
| 1992 | 65.92 | 125 |
| 1991 | 65 | 137 |