| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 90.43 | 25 |
| 2015 | 90.16 | 25 |
| 2014 | 89.87 | 23 |
| 2013 | 89.57 | 22 |
| 2012 | 89.25 | 23 |
| 2011 | 88.91 | 23 |
| 2010 | 88.55 | 26 |
| 2009 | 88.18 | 28 |
| 2008 | 87.8 | 28 |
| 2007 | 87.41 | 29 |
| 2006 | 87.01 | 29 |
| 2005 | 86.6 | 28 |
| 2004 | 86.18 | 29 |
| 2003 | 85.74 | 30 |
| 2002 | 85.3 | 30 |
| 2001 | 84.84 | 31 |
| 2000 | 84.22 | 31 |
| 1999 | 83.45 | 32 |
| 1998 | 82.89 | 31 |
| 1997 | 82.78 | 31 |
| 1996 | 82.83 | 31 |
| 1995 | 82.89 | 31 |
| 1994 | 82.48 | 31 |
| 1993 | 81.86 | 31 |
| 1992 | 81.53 | 31 |
| 1991 | 81.13 | 31 |
| 1990 | 80.95 | 31 |
| 1989 | 80.89 | 30 |
| 1988 | 80.84 | 30 |
| 1987 | 80.78 | 30 |
| 1986 | 80.73 | 29 |