| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 64.6 | 82 |
| 2015 | 64.7 | 80 |
| 2014 | 64.8 | 77 |
| 2013 | 65.02 | 77 |
| 2012 | 65.27 | 74 |
| 2011 | 65.6 | 71 |
| 2010 | 65.54 | 71 |
| 2009 | 65.5 | 72 |
| 2008 | 65.61 | 71 |
| 2007 | 65.34 | 70 |
| 2006 | 64.89 | 75 |
| 2005 | 64.51 | 81 |
| 2004 | 63.6 | 84 |
| 2003 | 63.74 | 81 |
| 2002 | 63.57 | 83 |
| 2001 | 63.55 | 83 |
| 2000 | 63.5 | 81 |
| 1999 | 63.12 | 85 |
| 1998 | 63.29 | 85 |
| 1997 | 63.35 | 84 |
| 1996 | 63.66 | 81 |
| 1995 | 63.78 | 80 |
| 1994 | 63.08 | 86 |
| 1993 | 62.68 | 88 |
| 1992 | 62.99 | 85 |
| 1991 | 63.28 | 87 |
| 1990 | 63.88 | 82 |