| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 91.89 | 23 |
| 2015 | 91.75 | 23 |
| 2014 | 91.6 | 21 |
| 2013 | 91.45 | 21 |
| 2012 | 91.3 | 20 |
| 2011 | 91.13 | 20 |
| 2010 | 90.97 | 19 |
| 2009 | 90.8 | 19 |
| 2008 | 90.62 | 19 |
| 2007 | 90.45 | 19 |
| 2006 | 90.27 | 20 |
| 2005 | 90.08 | 21 |
| 2004 | 89.9 | 21 |
| 2003 | 89.71 | 21 |
| 2002 | 89.52 | 21 |
| 2001 | 89.33 | 21 |
| 2000 | 89.14 | 21 |
| 1999 | 88.95 | 21 |
| 1998 | 88.76 | 21 |
| 1997 | 88.56 | 21 |
| 1996 | 88.37 | 21 |
| 1995 | 88.16 | 21 |
| 1994 | 87.96 | 21 |
| 1993 | 87.75 | 21 |
| 1992 | 87.54 | 21 |
| 1991 | 87.33 | 21 |
| 1990 | 86.98 | 21 |
| 1989 | 86.61 | 21 |
| 1988 | 86.23 | 21 |
| 1987 | 85.84 | 20 |
| 1986 | 85.45 | 20 |