| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.161 | 112 |
| 2015 | 50.171 | 110 |
| 2014 | 50.18 | 108 |
| 2013 | 50.189 | 108 |
| 2012 | 50.198 | 108 |
| 2011 | 50.208 | 109 |
| 2010 | 50.221 | 108 |
| 2009 | 50.237 | 108 |
| 2008 | 50.256 | 109 |
| 2007 | 50.276 | 107 |
| 2006 | 50.297 | 105 |
| 2005 | 50.317 | 104 |
| 2004 | 50.335 | 102 |
| 2003 | 50.353 | 101 |
| 2002 | 50.369 | 99 |
| 2001 | 50.387 | 97 |
| 2000 | 50.408 | 97 |
| 1999 | 50.43 | 98 |
| 1998 | 50.455 | 98 |
| 1997 | 50.481 | 94 |
| 1996 | 50.51 | 89 |
| 1995 | 50.54 | 86 |
| 1994 | 50.572 | 80 |
| 1993 | 50.606 | 77 |
| 1992 | 50.637 | 75 |
| 1991 | 50.66 | 72 |
| 1990 | 50.671 | 70 |
| 1989 | 50.668 | 72 |
| 1988 | 50.652 | 74 |
| 1987 | 50.627 | 77 |
| 1986 | 50.602 | 79 |