| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 86.41 | 1 |
| 2015 | 86.44 | 1 |
| 2014 | 86.47 | 1 |
| 2013 | 86.59 | 1 |
| 2012 | 86.71 | 1 |
| 2011 | 87.98 | 1 |
| 2010 | 89.05 | 1 |
| 2009 | 88.68 | 1 |
| 2008 | 88.24 | 1 |
| 2007 | 87.74 | 2 |
| 2006 | 87.2 | 2 |
| 2005 | 86.63 | 2 |
| 2004 | 86.71 | 3 |
| 2003 | 86.81 | 2 |
| 2002 | 86.92 | 2 |
| 2001 | 86.86 | 2 |
| 2000 | 86.88 | 2 |
| 1999 | 86.82 | 2 |
| 1998 | 86.71 | 2 |
| 1997 | 86.55 | 3 |
| 1996 | 86.39 | 5 |
| 1995 | 86.28 | 5 |
| 1994 | 86.21 | 5 |
| 1993 | 86.18 | 4 |
| 1992 | 86.2 | 4 |
| 1991 | 86.24 | 4 |
| 1990 | 86.23 | 4 |