| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 80.08 | 13 |
| 2015 | 80.53 | 13 |
| 2014 | 80.97 | 12 |
| 2013 | 81.41 | 12 |
| 2012 | 81.84 | 9 |
| 2011 | 82.27 | 8 |
| 2010 | 82.68 | 8 |
| 2009 | 83.09 | 8 |
| 2008 | 83.49 | 8 |
| 2007 | 83.88 | 8 |
| 2006 | 84.1 | 8 |
| 2005 | 84.3 | 8 |
| 2004 | 84.5 | 8 |
| 2003 | 84.69 | 8 |
| 2002 | 84.88 | 8 |
| 2001 | 85.07 | 7 |
| 2000 | 85.26 | 7 |
| 1999 | 85.45 | 8 |
| 1998 | 85.63 | 7 |
| 1997 | 85.81 | 8 |
| 1996 | 85.99 | 8 |
| 1995 | 86.17 | 7 |
| 1994 | 86.37 | 7 |
| 1993 | 86.63 | 7 |
| 1992 | 86.88 | 7 |
| 1991 | 87.13 | 7 |
| 1990 | 87.38 | 7 |
| 1989 | 87.62 | 7 |
| 1988 | 87.86 | 8 |
| 1987 | 88.09 | 8 |
| 1986 | 88.32 | 8 |