| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 89.498 | 2 |
| 2014 | 92.46 | 2 |
| 2013 | 94.24 | 1 |
| 2012 | 93.717 | 1 |
| 2011 | 93.492 | 1 |
| 2010 | 92.636 | 2 |
| 2009 | 89.324 | 3 |
| 2008 | 83.257 | 5 |
| 2007 | 81.213 | 8 |
| 2006 | 80.525 | 8 |
| 2005 | 85.132 | 3 |
| 2004 | 88.216 | 3 |
| 2003 | 87.697 | 4 |
| 2002 | 88.329 | 3 |
| 2001 | 87.583 | 3 |
| 2000 | 85.858 | 3 |
| 1999 | 84.349 | 2 |
| 1998 | 84.461 | 2 |
| 1997 | 85.685 | 3 |
| 1996 | 85.793 | 3 |
| 1995 | 85.218 | 1 |
| 1994 | 83.933 | 2 |
| 1993 | 82.764 | 3 |
| 1992 | 80.768 | 3 |
| 1991 | 79.42 | 3 |