| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 89.55 | 27 |
| 2015 | 89.42 | 27 |
| 2014 | 89.29 | 26 |
| 2013 | 89.15 | 26 |
| 2012 | 89.02 | 24 |
| 2011 | 88.88 | 24 |
| 2010 | 88.73 | 24 |
| 2009 | 88.59 | 24 |
| 2008 | 88.45 | 26 |
| 2007 | 88.3 | 25 |
| 2006 | 88.15 | 25 |
| 2005 | 88 | 25 |
| 2004 | 87.85 | 25 |
| 2003 | 87.7 | 25 |
| 2002 | 87.54 | 25 |
| 2001 | 87.38 | 25 |
| 2000 | 87.17 | 25 |
| 1999 | 86.95 | 25 |
| 1998 | 86.73 | 25 |
| 1997 | 86.5 | 25 |
| 1996 | 86.28 | 24 |
| 1995 | 86.11 | 24 |
| 1994 | 85.93 | 23 |
| 1993 | 85.75 | 23 |
| 1992 | 85.57 | 22 |
| 1991 | 85.4 | 22 |
| 1990 | 85.4 | 22 |
| 1989 | 85.4 | 22 |
| 1988 | 85.4 | 22 |
| 1987 | 85.4 | 22 |
| 1986 | 85.4 | 21 |