| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 80.89 | 39 |
| 2015 | 80.89 | 39 |
| 2014 | 80.87 | 40 |
| 2013 | 80.88 | 41 |
| 2012 | 80.87 | 42 |
| 2011 | 80.43 | 44 |
| 2010 | 79.76 | 51 |
| 2009 | 79.66 | 51 |
| 2008 | 79.35 | 56 |
| 2007 | 81.55 | 36 |
| 2006 | 83.62 | 24 |
| 2005 | 85.56 | 18 |
| 2004 | 85.38 | 17 |
| 2003 | 85.17 | 17 |
| 2002 | 84.94 | 20 |
| 2001 | 84.73 | 20 |
| 2000 | 84.54 | 20 |
| 1999 | 84.37 | 21 |
| 1998 | 84.25 | 23 |
| 1997 | 84.18 | 27 |
| 1996 | 84.16 | 30 |
| 1995 | 84.18 | 31 |
| 1994 | 84.25 | 32 |
| 1993 | 84.41 | 32 |
| 1992 | 84.57 | 32 |
| 1991 | 84.77 | 31 |
| 1990 | 84.98 | 30 |