| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 89.04 | 29 |
| 2015 | 88.99 | 29 |
| 2014 | 88.94 | 27 |
| 2013 | 88.89 | 27 |
| 2012 | 88.85 | 26 |
| 2011 | 88.81 | 25 |
| 2010 | 88.77 | 23 |
| 2009 | 88.73 | 23 |
| 2008 | 88.69 | 24 |
| 2007 | 88.65 | 23 |
| 2006 | 88.61 | 22 |
| 2005 | 88.56 | 22 |
| 2004 | 88.52 | 22 |
| 2003 | 88.48 | 22 |
| 2002 | 88.44 | 22 |
| 2001 | 88.3 | 24 |
| 2000 | 87.98 | 24 |
| 1999 | 87.65 | 24 |
| 1998 | 87.31 | 24 |
| 1997 | 86.96 | 23 |
| 1996 | 86.61 | 23 |
| 1995 | 86.24 | 23 |
| 1994 | 85.87 | 24 |
| 1993 | 85.49 | 24 |
| 1992 | 85.1 | 24 |
| 1991 | 84.7 | 26 |
| 1990 | 84.28 | 26 |
| 1989 | 83.83 | 26 |
| 1988 | 83.37 | 26 |
| 1987 | 82.9 | 27 |
| 1986 | 82.42 | 28 |