| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 89.06 | 7 |
| 2015 | 89.06 | 8 |
| 2014 | 89.08 | 8 |
| 2013 | 89.45 | 7 |
| 2012 | 89.62 | 7 |
| 2011 | 89.8 | 8 |
| 2010 | 89.98 | 7 |
| 2009 | 90.18 | 7 |
| 2008 | 90.36 | 4 |
| 2007 | 90.54 | 4 |
| 2006 | 90.69 | 4 |
| 2005 | 90.83 | 5 |
| 2004 | 90.78 | 4 |
| 2003 | 90.69 | 5 |
| 2002 | 90.59 | 5 |
| 2001 | 90.48 | 7 |
| 2000 | 90.37 | 8 |
| 1999 | 90.25 | 9 |
| 1998 | 90.28 | 9 |
| 1997 | 90.36 | 9 |
| 1996 | 90.41 | 9 |
| 1995 | 90.41 | 10 |
| 1994 | 90.4 | 11 |
| 1993 | 90.37 | 11 |
| 1992 | 90.3 | 11 |
| 1991 | 90.31 | 11 |
| 1990 | 90.34 | 12 |