| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 68.65 | 50 |
| 2015 | 68.5 | 52 |
| 2014 | 68.3 | 52 |
| 2013 | 68.09 | 52 |
| 2012 | 67.84 | 53 |
| 2011 | 67.56 | 57 |
| 2010 | 67.26 | 57 |
| 2009 | 67.03 | 58 |
| 2008 | 66.77 | 60 |
| 2007 | 66.52 | 59 |
| 2006 | 66.31 | 62 |
| 2005 | 66.18 | 64 |
| 2004 | 66.1 | 64 |
| 2003 | 66.13 | 63 |
| 2002 | 66.23 | 64 |
| 2001 | 66.36 | 63 |
| 2000 | 66.47 | 60 |
| 1999 | 66.56 | 60 |
| 1998 | 66.65 | 56 |
| 1997 | 66.73 | 54 |
| 1996 | 66.8 | 55 |
| 1995 | 66.86 | 53 |
| 1994 | 66.85 | 52 |
| 1993 | 66.82 | 55 |
| 1992 | 66.76 | 54 |
| 1991 | 66.7 | 55 |
| 1990 | 66.67 | 59 |