| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 86.28 | 7 |
| 2015 | 86.44 | 7 |
| 2014 | 86.55 | 6 |
| 2013 | 86.77 | 6 |
| 2012 | 86.85 | 7 |
| 2011 | 87.2 | 6 |
| 2010 | 87.29 | 6 |
| 2009 | 87.42 | 4 |
| 2008 | 87.73 | 2 |
| 2007 | 87.96 | 3 |
| 2006 | 88.08 | 4 |
| 2005 | 88.32 | 4 |
| 2004 | 88.16 | 3 |
| 2003 | 87.81 | 6 |
| 2002 | 87.42 | 4 |
| 2001 | 86.99 | 5 |
| 2000 | 87.62 | 6 |
| 1999 | 86.07 | 9 |
| 1998 | 86.72 | 8 |
| 1997 | 87.32 | 6 |
| 1996 | 87.82 | 5 |
| 1995 | 87.83 | 6 |
| 1994 | 87.83 | 5 |
| 1993 | 87.81 | 6 |
| 1992 | 87.61 | 8 |
| 1991 | 87.61 | 10 |