| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 70.037 | 43 |
| 2014 | 71.036 | 41 |
| 2013 | 71.786 | 35 |
| 2012 | 71.963 | 37 |
| 2011 | 71.903 | 36 |
| 2010 | 70.381 | 41 |
| 2009 | 71.613 | 37 |
| 2008 | 69.885 | 41 |
| 2007 | 69.066 | 47 |
| 2006 | 68.932 | 45 |
| 2005 | 68.766 | 45 |
| 2004 | 68.474 | 44 |
| 2003 | 68.296 | 43 |
| 2002 | 68.067 | 42 |
| 2001 | 67.199 | 44 |
| 2000 | 65.759 | 49 |
| 1999 | 65.495 | 46 |
| 1998 | 64.855 | 48 |
| 1997 | 64.286 | 48 |
| 1996 | 63.611 | 47 |
| 1995 | 63.639 | 45 |
| 1994 | 63.237 | 37 |
| 1993 | 63.792 | 35 |
| 1992 | 62.28 | 38 |
| 1991 | 61.048 | 36 |
| 1990 | 60.553 | 33 |
| 1989 | 60.757 | 26 |
| 1988 | 60.847 | 22 |
| 1987 | 60.991 | 25 |
| 1986 | 60.406 | 24 |