| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 84.59 | 10 |
| 2015 | 84.96 | 10 |
| 2014 | 84.82 | 10 |
| 2013 | 84.93 | 10 |
| 2012 | 85.32 | 11 |
| 2011 | 85.91 | 9 |
| 2010 | 86.58 | 8 |
| 2009 | 85.78 | 10 |
| 2008 | 84.99 | 12 |
| 2007 | 84.37 | 12 |
| 2006 | 84.03 | 12 |
| 2005 | 84.01 | 13 |
| 2004 | 83.17 | 14 |
| 2003 | 83.43 | 14 |
| 2002 | 83.99 | 12 |
| 2001 | 84.98 | 12 |
| 2000 | 85.9 | 9 |
| 1999 | 85.74 | 12 |
| 1998 | 85.69 | 12 |
| 1997 | 85.9 | 12 |
| 1996 | 86.36 | 11 |
| 1995 | 86.99 | 11 |
| 1994 | 86.79 | 11 |
| 1993 | 86.65 | 14 |
| 1992 | 86.68 | 12 |
| 1991 | 86.94 | 12 |