| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.59 | 81 |
| 2015 | 69.47 | 81 |
| 2014 | 69.36 | 78 |
| 2013 | 69.26 | 77 |
| 2012 | 69.18 | 75 |
| 2011 | 69.1 | 74 |
| 2010 | 69.03 | 73 |
| 2009 | 68.98 | 73 |
| 2008 | 68.93 | 73 |
| 2007 | 68.87 | 70 |
| 2006 | 68.82 | 68 |
| 2005 | 68.77 | 68 |
| 2004 | 68.71 | 69 |
| 2003 | 68.66 | 69 |
| 2002 | 68.6 | 70 |
| 2001 | 68.55 | 70 |
| 2000 | 68.5 | 69 |
| 1999 | 68.44 | 69 |
| 1998 | 68.39 | 70 |
| 1997 | 68.41 | 68 |
| 1996 | 68.59 | 67 |
| 1995 | 68.78 | 65 |
| 1994 | 68.97 | 65 |
| 1993 | 69.15 | 65 |
| 1992 | 69.34 | 63 |
| 1991 | 69.52 | 60 |
| 1990 | 69.71 | 58 |
| 1989 | 69.89 | 58 |
| 1988 | 70.07 | 58 |
| 1987 | 70.02 | 53 |
| 1986 | 69.4 | 54 |