| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.27 | 95 |
| 2015 | 67.5 | 95 |
| 2014 | 67.65 | 93 |
| 2013 | 67.33 | 96 |
| 2012 | 67.14 | 96 |
| 2011 | 66.19 | 104 |
| 2010 | 65.18 | 108 |
| 2009 | 64.29 | 118 |
| 2008 | 66.17 | 110 |
| 2007 | 65.44 | 116 |
| 2006 | 63.58 | 133 |
| 2005 | 63.55 | 127 |
| 2004 | 62.76 | 133 |
| 2003 | 62 | 139 |
| 2002 | 61.57 | 139 |
| 2001 | 60.71 | 151 |
| 2000 | 60.97 | 150 |
| 1999 | 59.52 | 153 |
| 1998 | 56.28 | 172 |
| 1997 | 58.27 | 164 |
| 1996 | 61.52 | 152 |
| 1995 | 63.08 | 144 |
| 1994 | 64.36 | 136 |
| 1993 | 68.18 | 105 |
| 1992 | 70.64 | 90 |
| 1991 | 66.09 | 128 |