| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 54.45 | 135 |
| 2015 | 53.62 | 132 |
| 2014 | 53.22 | 129 |
| 2013 | 52.43 | 127 |
| 2012 | 51.5 | 125 |
| 2011 | 50.86 | 121 |
| 2010 | 50.82 | 119 |
| 2009 | 50.86 | 117 |
| 2008 | 51.33 | 117 |
| 2007 | 52.12 | 116 |
| 2006 | 53.05 | 116 |
| 2005 | 53.99 | 116 |
| 2004 | 55.42 | 116 |
| 2003 | 57.05 | 115 |
| 2002 | 58.83 | 114 |
| 2001 | 60.66 | 115 |
| 2000 | 62.44 | 115 |
| 1999 | 64.36 | 117 |
| 1998 | 66.11 | 117 |
| 1997 | 67.71 | 116 |
| 1996 | 69.32 | 117 |
| 1995 | 71.09 | 117 |
| 1994 | 72.37 | 116 |
| 1993 | 73.6 | 116 |
| 1992 | 74.64 | 118 |
| 1991 | 75.25 | 120 |
| 1990 | 75.26 | 118 |
| 1989 | 75.51 | 117 |
| 1988 | 75.4 | 116 |
| 1987 | 75.09 | 113 |
| 1986 | 74.76 | 111 |