| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.35 | 90 |
| 2015 | 63.52 | 89 |
| 2014 | 63.69 | 88 |
| 2013 | 64.34 | 84 |
| 2012 | 64.95 | 78 |
| 2011 | 65.47 | 72 |
| 2010 | 65.85 | 66 |
| 2009 | 65.95 | 70 |
| 2008 | 66.05 | 67 |
| 2007 | 66.22 | 62 |
| 2006 | 66.5 | 61 |
| 2005 | 66.87 | 57 |
| 2004 | 67.03 | 58 |
| 2003 | 67.19 | 59 |
| 2002 | 67.43 | 56 |
| 2001 | 67.78 | 54 |
| 2000 | 68.02 | 50 |
| 1999 | 67.55 | 53 |
| 1998 | 67.1 | 53 |
| 1997 | 66.72 | 55 |
| 1996 | 66.46 | 58 |
| 1995 | 66.3 | 57 |
| 1994 | 65.97 | 55 |
| 1993 | 65.71 | 60 |
| 1992 | 65.53 | 64 |
| 1991 | 65.39 | 69 |
| 1990 | 65.15 | 72 |