| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 67.68 | 34 |
| 2015 | 68.39 | 32 |
| 2014 | 69.1 | 30 |
| 2013 | 69.8 | 30 |
| 2012 | 70.51 | 30 |
| 2011 | 71.2 | 31 |
| 2010 | 71.89 | 30 |
| 2009 | 72.56 | 29 |
| 2008 | 73.22 | 28 |
| 2007 | 73.88 | 27 |
| 2006 | 74.52 | 27 |
| 2005 | 75.16 | 27 |
| 2004 | 75.78 | 27 |
| 2003 | 76.39 | 26 |
| 2002 | 76.96 | 25 |
| 2001 | 77.33 | 25 |
| 2000 | 77.69 | 24 |
| 1999 | 78.05 | 24 |
| 1998 | 78.41 | 23 |
| 1997 | 78.76 | 22 |
| 1996 | 79.11 | 22 |
| 1995 | 79.46 | 23 |
| 1994 | 79.8 | 23 |
| 1993 | 80.13 | 23 |
| 1992 | 80.46 | 23 |
| 1991 | 80.79 | 23 |
| 1990 | 81.12 | 23 |
| 1989 | 81.44 | 22 |
| 1988 | 81.78 | 22 |
| 1987 | 82.28 | 22 |
| 1986 | 82.76 | 21 |