| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.189 | 105 |
| 2015 | 50.205 | 105 |
| 2014 | 50.211 | 104 |
| 2013 | 50.212 | 105 |
| 2012 | 50.219 | 106 |
| 2011 | 50.25 | 102 |
| 2010 | 50.318 | 102 |
| 2009 | 50.427 | 93 |
| 2008 | 50.57 | 83 |
| 2007 | 50.739 | 66 |
| 2006 | 50.915 | 58 |
| 2005 | 51.084 | 46 |
| 2004 | 51.247 | 35 |
| 2003 | 51.402 | 31 |
| 2002 | 51.544 | 26 |
| 2001 | 51.666 | 25 |
| 2000 | 51.761 | 22 |
| 1999 | 51.823 | 20 |
| 1998 | 51.852 | 17 |
| 1997 | 51.866 | 16 |
| 1996 | 51.887 | 15 |
| 1995 | 51.933 | 14 |
| 1994 | 52.013 | 14 |
| 1993 | 52.125 | 14 |
| 1992 | 52.26 | 12 |
| 1991 | 52.404 | 9 |
| 1990 | 52.543 | 8 |
| 1989 | 52.67 | 8 |
| 1988 | 52.786 | 7 |
| 1987 | 52.897 | 7 |
| 1986 | 53.012 | 6 |