| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 88.49 | 2 |
| 2015 | 88.86 | 2 |
| 2014 | 88.58 | 2 |
| 2013 | 88.49 | 2 |
| 2012 | 88.47 | 3 |
| 2011 | 88.42 | 4 |
| 2010 | 88.25 | 3 |
| 2009 | 87.16 | 6 |
| 2008 | 87.38 | 4 |
| 2007 | 87.32 | 5 |
| 2006 | 87.69 | 5 |
| 2005 | 88.88 | 2 |
| 2004 | 88.16 | 4 |
| 2003 | 88.08 | 4 |
| 2002 | 87.79 | 3 |
| 2001 | 88.32 | 2 |
| 2000 | 90.01 | 2 |
| 1999 | 89.15 | 2 |
| 1998 | 88.79 | 2 |
| 1997 | 89.1 | 2 |
| 1996 | 89.48 | 2 |
| 1995 | 90.99 | 2 |
| 1994 | 90.37 | 2 |
| 1993 | 89.26 | 2 |
| 1992 | 88.71 | 2 |
| 1991 | 88.67 | 5 |