| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 75.51 | 65 |
| 2015 | 75.3 | 65 |
| 2014 | 75.09 | 63 |
| 2013 | 74.89 | 63 |
| 2012 | 74.69 | 62 |
| 2011 | 74.49 | 62 |
| 2010 | 74.29 | 61 |
| 2009 | 74.09 | 61 |
| 2008 | 73.9 | 60 |
| 2007 | 73.7 | 59 |
| 2006 | 73.49 | 62 |
| 2005 | 73.36 | 62 |
| 2004 | 73.29 | 60 |
| 2003 | 73.23 | 60 |
| 2002 | 73.17 | 60 |
| 2001 | 73.11 | 58 |
| 2000 | 73.07 | 57 |
| 1999 | 73.06 | 57 |
| 1998 | 73.1 | 57 |
| 1997 | 73.17 | 57 |
| 1996 | 73.23 | 57 |
| 1995 | 73.29 | 56 |
| 1994 | 73.34 | 55 |
| 1993 | 73.38 | 53 |
| 1992 | 73.36 | 53 |
| 1991 | 73.27 | 53 |
| 1990 | 73.12 | 53 |
| 1989 | 72.98 | 48 |
| 1988 | 73 | 47 |
| 1987 | 72.21 | 47 |
| 1986 | 72.62 | 46 |