| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 64.9 | 116 |
| 2015 | 65.41 | 111 |
| 2014 | 66.07 | 106 |
| 2013 | 66.39 | 103 |
| 2012 | 67.07 | 97 |
| 2011 | 67.01 | 100 |
| 2010 | 67.17 | 99 |
| 2009 | 67.95 | 94 |
| 2008 | 69.77 | 88 |
| 2007 | 68.99 | 94 |
| 2006 | 67.99 | 100 |
| 2005 | 67.29 | 100 |
| 2004 | 67.32 | 100 |
| 2003 | 67.58 | 95 |
| 2002 | 68.77 | 92 |
| 2001 | 69.04 | 93 |
| 2000 | 69.6 | 86 |
| 1999 | 69.73 | 85 |
| 1998 | 70.04 | 88 |
| 1997 | 68.75 | 96 |
| 1996 | 67.34 | 105 |
| 1995 | 64.96 | 124 |
| 1994 | 64.84 | 128 |
| 1993 | 63.93 | 137 |
| 1992 | 64.58 | 135 |
| 1991 | 65.3 | 134 |