| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 87.68 | 3 |
| 2015 | 87.92 | 3 |
| 2014 | 88.18 | 3 |
| 2013 | 88.41 | 3 |
| 2012 | 88.57 | 2 |
| 2011 | 88.49 | 3 |
| 2010 | 88.45 | 2 |
| 2009 | 87.78 | 2 |
| 2008 | 86.47 | 8 |
| 2007 | 86.05 | 10 |
| 2006 | 87.06 | 8 |
| 2005 | 87.58 | 6 |
| 2004 | 86.78 | 8 |
| 2003 | 85.93 | 9 |
| 2002 | 85.74 | 9 |
| 2001 | 85.66 | 10 |
| 2000 | 85.49 | 11 |
| 1999 | 87.57 | 7 |
| 1998 | 87.31 | 7 |
| 1997 | 87.49 | 5 |
| 1996 | 87.8 | 6 |
| 1995 | 87.24 | 10 |
| 1994 | 86.23 | 17 |
| 1993 | 87.51 | 8 |
| 1992 | 86.9 | 10 |
| 1991 | 85.68 | 17 |