| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 89.24 | 28 |
| 2015 | 89.33 | 28 |
| 2014 | 89.43 | 24 |
| 2013 | 89.54 | 23 |
| 2012 | 89.65 | 22 |
| 2011 | 89.78 | 22 |
| 2010 | 89.91 | 22 |
| 2009 | 90.03 | 20 |
| 2008 | 90.16 | 20 |
| 2007 | 90.29 | 20 |
| 2006 | 90.41 | 19 |
| 2005 | 90.53 | 19 |
| 2004 | 90.66 | 20 |
| 2003 | 90.78 | 20 |
| 2002 | 90.89 | 20 |
| 2001 | 91.01 | 20 |
| 2000 | 90.75 | 20 |
| 1999 | 90.2 | 20 |
| 1998 | 89.62 | 20 |
| 1997 | 89 | 20 |
| 1996 | 88.36 | 22 |
| 1995 | 87.68 | 22 |
| 1994 | 86.97 | 22 |
| 1993 | 86.22 | 22 |
| 1992 | 85.44 | 23 |
| 1991 | 84.95 | 23 |
| 1990 | 84.68 | 25 |
| 1989 | 84.41 | 25 |
| 1988 | 84.13 | 25 |
| 1987 | 83.85 | 25 |
| 1986 | 83.56 | 25 |