| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.91 | 134 |
| 2015 | 51.85 | 134 |
| 2014 | 51.77 | 133 |
| 2013 | 51.9 | 129 |
| 2012 | 52.01 | 125 |
| 2011 | 52.71 | 124 |
| 2010 | 53.35 | 124 |
| 2009 | 54.12 | 117 |
| 2008 | 54.97 | 111 |
| 2007 | 56.23 | 110 |
| 2006 | 56.91 | 103 |
| 2005 | 57.93 | 90 |
| 2004 | 57.9 | 88 |
| 2003 | 57.55 | 88 |
| 2002 | 57 | 90 |
| 2001 | 57.01 | 94 |
| 2000 | 56.39 | 95 |
| 1999 | 56.73 | 93 |
| 1998 | 57.08 | 92 |
| 1997 | 57.22 | 88 |
| 1996 | 57.78 | 85 |
| 1995 | 58.08 | 83 |
| 1994 | 58.52 | 76 |
| 1993 | 58.31 | 78 |
| 1992 | 58.41 | 77 |
| 1991 | 58.36 | 78 |