| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 86.32 | 37 |
| 2015 | 86.28 | 37 |
| 2014 | 86.25 | 34 |
| 2013 | 86.22 | 33 |
| 2012 | 86.2 | 34 |
| 2011 | 86.18 | 33 |
| 2010 | 86.17 | 33 |
| 2009 | 86.15 | 33 |
| 2008 | 86.13 | 32 |
| 2007 | 86.1 | 32 |
| 2006 | 86.08 | 32 |
| 2005 | 86.05 | 30 |
| 2004 | 86.03 | 30 |
| 2003 | 86 | 29 |
| 2002 | 85.9 | 29 |
| 2001 | 85.76 | 28 |
| 2000 | 85.68 | 28 |
| 1999 | 85.61 | 28 |
| 1998 | 85.55 | 27 |
| 1997 | 85.49 | 26 |
| 1996 | 85.42 | 26 |
| 1995 | 85.33 | 25 |
| 1994 | 85.23 | 25 |
| 1993 | 85.13 | 25 |
| 1992 | 85.03 | 25 |
| 1991 | 84.93 | 24 |
| 1990 | 84.74 | 24 |
| 1989 | 84.51 | 24 |
| 1988 | 84.27 | 24 |
| 1987 | 84.03 | 24 |
| 1986 | 83.78 | 24 |