| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.3 | 96 |
| 2015 | 64.8 | 96 |
| 2014 | 64.3 | 94 |
| 2013 | 63.79 | 94 |
| 2012 | 63.27 | 94 |
| 2011 | 62.75 | 95 |
| 2010 | 62.22 | 95 |
| 2009 | 61.69 | 95 |
| 2008 | 61.15 | 96 |
| 2007 | 60.62 | 97 |
| 2006 | 60.08 | 97 |
| 2005 | 59.54 | 98 |
| 2004 | 58.99 | 98 |
| 2003 | 58.45 | 98 |
| 2002 | 57.9 | 99 |
| 2001 | 57.37 | 99 |
| 2000 | 56.89 | 99 |
| 1999 | 56.41 | 99 |
| 1998 | 55.93 | 102 |
| 1997 | 55.45 | 102 |
| 1996 | 54.97 | 102 |
| 1995 | 54.49 | 101 |
| 1994 | 54 | 101 |
| 1993 | 53.52 | 101 |
| 1992 | 53.04 | 103 |
| 1991 | 52.55 | 104 |
| 1990 | 52.04 | 104 |
| 1989 | 51.51 | 103 |
| 1988 | 50.97 | 102 |
| 1987 | 50.44 | 102 |
| 1986 | 49.91 | 103 |