| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 59.166 | 70 |
| 2015 | 60.158 | 88 |
| 2014 | 62.157 | 75 |
| 2013 | 64.215 | 72 |
| 2012 | 62.531 | 78 |
| 2011 | 61.43 | 79 |
| 2010 | 62.291 | 78 |
| 2009 | 62.128 | 83 |
| 2008 | 58.479 | 92 |
| 2007 | 55.805 | 103 |
| 2006 | 55.198 | 100 |
| 2005 | 57.255 | 93 |
| 2004 | 52.195 | 116 |
| 2003 | 53.312 | 109 |
| 2002 | 50.844 | 117 |
| 2001 | 48.929 | 119 |
| 2000 | 46.601 | 121 |
| 1999 | 47.213 | 117 |
| 1998 | 49.632 | 109 |
| 1997 | 50.482 | 102 |
| 1996 | 47.971 | 102 |
| 1995 | 41.915 | 124 |
| 1994 | 36.24 | 117 |
| 1993 | 40.645 | 101 |
| 1992 | 28.734 | 122 |
| 1991 | 26.733 | 123 |
| 1990 | 29.855 | 116 |
| 1989 | 28.69 | 104 |
| 1988 | 31.374 | 97 |
| 1987 | 31.24 | 99 |