| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.492 | 84 |
| 2015 | 50.521 | 79 |
| 2014 | 50.559 | 76 |
| 2013 | 50.606 | 73 |
| 2012 | 50.654 | 72 |
| 2011 | 50.693 | 70 |
| 2010 | 50.716 | 68 |
| 2009 | 50.719 | 68 |
| 2008 | 50.703 | 69 |
| 2007 | 50.674 | 74 |
| 2006 | 50.64 | 77 |
| 2005 | 50.607 | 83 |
| 2004 | 50.576 | 83 |
| 2003 | 50.548 | 83 |
| 2002 | 50.519 | 87 |
| 2001 | 50.488 | 91 |
| 2000 | 50.453 | 94 |
| 1999 | 50.415 | 100 |
| 1998 | 50.375 | 101 |
| 1997 | 50.334 | 104 |
| 1996 | 50.293 | 110 |
| 1995 | 50.253 | 115 |
| 1994 | 50.215 | 117 |
| 1993 | 50.178 | 118 |
| 1992 | 50.146 | 119 |
| 1991 | 50.121 | 126 |
| 1990 | 50.107 | 126 |
| 1989 | 50.104 | 124 |
| 1988 | 50.113 | 123 |
| 1987 | 50.13 | 119 |
| 1986 | 50.151 | 116 |