| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 87.807 | 3 |
| 2014 | 87.67 | 3 |
| 2013 | 86.524 | 5 |
| 2012 | 86.824 | 6 |
| 2011 | 84.647 | 6 |
| 2010 | 84.469 | 6 |
| 2009 | 85.612 | 5 |
| 2008 | 85.921 | 3 |
| 2007 | 83.379 | 4 |
| 2006 | 81.427 | 6 |
| 2005 | 78.864 | 12 |
| 2004 | 77.615 | 14 |
| 2003 | 74.85 | 18 |
| 2002 | 70.687 | 30 |
| 2001 | 74.657 | 19 |
| 2000 | 77.541 | 12 |
| 1999 | 83.791 | 3 |
| 1998 | 84.305 | 3 |
| 1997 | 88.019 | 2 |
| 1996 | 87.014 | 2 |
| 1995 | 84.718 | 2 |
| 1994 | 83.696 | 4 |
| 1993 | 80.651 | 6 |
| 1992 | 68.9 | 19 |