| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 66.7 | 67 |
| 2015 | 66.42 | 66 |
| 2014 | 66.16 | 67 |
| 2013 | 66.05 | 69 |
| 2012 | 65.9 | 69 |
| 2011 | 65.78 | 70 |
| 2010 | 65.63 | 70 |
| 2009 | 65.55 | 71 |
| 2008 | 65.47 | 73 |
| 2007 | 66.37 | 60 |
| 2006 | 67.34 | 56 |
| 2005 | 68.36 | 49 |
| 2004 | 69.42 | 46 |
| 2003 | 70.5 | 41 |
| 2002 | 71.58 | 37 |
| 2001 | 72.67 | 32 |
| 2000 | 73.75 | 30 |
| 1999 | 74.8 | 27 |
| 1998 | 74.85 | 27 |
| 1997 | 74.93 | 25 |
| 1996 | 75.04 | 25 |
| 1995 | 75.16 | 27 |
| 1994 | 75.2 | 25 |
| 1993 | 75.3 | 26 |
| 1992 | 75.38 | 27 |
| 1991 | 75.53 | 27 |
| 1990 | 75.62 | 26 |