| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.53 | 86 |
| 2015 | 69.31 | 86 |
| 2014 | 69 | 88 |
| 2013 | 68.63 | 88 |
| 2012 | 68.24 | 89 |
| 2011 | 67.85 | 93 |
| 2010 | 67.48 | 96 |
| 2009 | 66.99 | 102 |
| 2008 | 66.53 | 109 |
| 2007 | 66.07 | 109 |
| 2006 | 65.63 | 112 |
| 2005 | 65.31 | 115 |
| 2004 | 65.09 | 116 |
| 2003 | 64.93 | 119 |
| 2002 | 64.94 | 121 |
| 2001 | 64.99 | 123 |
| 2000 | 65.01 | 124 |
| 1999 | 65.04 | 122 |
| 1998 | 65.05 | 124 |
| 1997 | 65.05 | 123 |
| 1996 | 65.01 | 122 |
| 1995 | 65.39 | 120 |
| 1994 | 65.63 | 120 |
| 1993 | 65.97 | 120 |
| 1992 | 66.23 | 122 |
| 1991 | 66.62 | 123 |