| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.237 | 100 |
| 2015 | 50.213 | 102 |
| 2014 | 50.188 | 107 |
| 2013 | 50.162 | 111 |
| 2012 | 50.135 | 112 |
| 2011 | 50.108 | 116 |
| 2010 | 50.081 | 118 |
| 2009 | 50.054 | 121 |
| 2008 | 50.028 | 125 |
| 2007 | 50.001 | 128 |
| 2006 | 49.973 | 130 |
| 2005 | 49.944 | 131 |
| 2004 | 49.915 | 134 |
| 2003 | 49.885 | 137 |
| 2002 | 49.854 | 140 |
| 2001 | 49.824 | 144 |
| 2000 | 49.796 | 145 |
| 1999 | 49.769 | 145 |
| 1998 | 49.744 | 146 |
| 1997 | 49.72 | 147 |
| 1996 | 49.699 | 145 |
| 1995 | 49.679 | 146 |
| 1994 | 49.663 | 148 |
| 1993 | 49.649 | 150 |
| 1992 | 49.637 | 148 |
| 1991 | 49.625 | 148 |
| 1990 | 49.614 | 149 |
| 1989 | 49.602 | 148 |
| 1988 | 49.59 | 148 |
| 1987 | 49.577 | 147 |
| 1986 | 49.563 | 146 |