| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 64.405 | 51 |
| 2015 | 63.273 | 72 |
| 2014 | 62.002 | 77 |
| 2013 | 62.222 | 81 |
| 2012 | 60.817 | 84 |
| 2011 | 58.227 | 98 |
| 2010 | 57.312 | 101 |
| 2009 | 58.559 | 100 |
| 2008 | 58.533 | 91 |
| 2007 | 52.624 | 113 |
| 2006 | 51.207 | 116 |
| 2005 | 55.205 | 103 |
| 2004 | 56.351 | 95 |
| 2003 | 58.656 | 88 |
| 2002 | 59.968 | 81 |
| 2001 | 60.227 | 79 |
| 2000 | 59.514 | 77 |
| 1999 | 60.189 | 65 |
| 1998 | 59.515 | 68 |
| 1997 | 56.883 | 77 |
| 1996 | 56.209 | 73 |
| 1995 | 49.868 | 104 |
| 1994 | 50.815 | 73 |
| 1993 | 51.577 | 67 |
| 1992 | 50.38 | 67 |
| 1991 | 48.304 | 71 |
| 1990 | 47.303 | 68 |
| 1989 | 46.954 | 63 |
| 1988 | 45.24 | 67 |
| 1987 | 49.303 | 59 |
| 1986 | 50.491 | 53 |