| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 49.799 | 143 |
| 2015 | 49.838 | 139 |
| 2014 | 49.902 | 136 |
| 2013 | 49.984 | 126 |
| 2012 | 50.075 | 119 |
| 2011 | 50.156 | 113 |
| 2010 | 50.214 | 110 |
| 2009 | 50.247 | 107 |
| 2008 | 50.258 | 108 |
| 2007 | 50.252 | 111 |
| 2006 | 50.236 | 112 |
| 2005 | 50.219 | 113 |
| 2004 | 50.201 | 116 |
| 2003 | 50.181 | 115 |
| 2002 | 50.163 | 117 |
| 2001 | 50.159 | 121 |
| 2000 | 50.17 | 119 |
| 1999 | 50.203 | 117 |
| 1998 | 50.255 | 111 |
| 1997 | 50.318 | 107 |
| 1996 | 50.381 | 103 |
| 1995 | 50.434 | 99 |
| 1994 | 50.475 | 96 |
| 1993 | 50.508 | 88 |
| 1992 | 50.534 | 87 |
| 1991 | 50.558 | 84 |
| 1990 | 50.584 | 84 |
| 1989 | 50.609 | 79 |
| 1988 | 50.635 | 76 |
| 1987 | 50.667 | 73 |
| 1986 | 50.711 | 70 |