| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 87.438 | 1 |
| 2015 | 87.317 | 4 |
| 2014 | 86.803 | 6 |
| 2013 | 87.235 | 4 |
| 2012 | 87.647 | 4 |
| 2011 | 87.252 | 4 |
| 2010 | 87.02 | 4 |
| 2009 | 86.86 | 4 |
| 2008 | 84.74 | 4 |
| 2007 | 82.929 | 5 |
| 2006 | 84.424 | 3 |
| 2005 | 83.052 | 4 |
| 2004 | 81.779 | 7 |
| 2003 | 81.397 | 8 |
| 2002 | 81.43 | 9 |
| 2001 | 81.109 | 9 |
| 2000 | 80.709 | 9 |
| 1999 | 80.373 | 8 |
| 1998 | 78.311 | 10 |
| 1997 | 79.079 | 8 |
| 1996 | 79.712 | 9 |
| 1995 | 77.811 | 9 |