| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 55.71 | 113 |
| 2015 | 55.88 | 113 |
| 2014 | 56.12 | 114 |
| 2013 | 56.39 | 115 |
| 2012 | 56.69 | 116 |
| 2011 | 57.02 | 114 |
| 2010 | 57.36 | 114 |
| 2009 | 57.79 | 114 |
| 2008 | 58.27 | 114 |
| 2007 | 58.75 | 113 |
| 2006 | 59.18 | 110 |
| 2005 | 59.52 | 107 |
| 2004 | 59.84 | 104 |
| 2003 | 60.09 | 103 |
| 2002 | 60.26 | 99 |
| 2001 | 60.35 | 96 |
| 2000 | 60.38 | 91 |
| 1999 | 60.45 | 86 |
| 1998 | 60.37 | 84 |
| 1997 | 60.21 | 79 |
| 1996 | 60.04 | 78 |
| 1995 | 59.9 | 73 |
| 1994 | 59.97 | 72 |
| 1993 | 60.15 | 72 |
| 1992 | 60.38 | 72 |
| 1991 | 60.5 | 72 |
| 1990 | 60.39 | 72 |
| 1989 | 60.58 | 71 |
| 1988 | 60.65 | 69 |
| 1987 | 60.61 | 67 |
| 1986 | 60.6 | 65 |