| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.702 | 24 |
| 2015 | 51.696 | 24 |
| 2014 | 51.688 | 24 |
| 2013 | 51.68 | 23 |
| 2012 | 51.671 | 23 |
| 2011 | 51.661 | 23 |
| 2010 | 51.65 | 24 |
| 2009 | 51.64 | 24 |
| 2008 | 51.629 | 24 |
| 2007 | 51.617 | 24 |
| 2006 | 51.602 | 26 |
| 2005 | 51.583 | 27 |
| 2004 | 51.56 | 27 |
| 2003 | 51.534 | 27 |
| 2002 | 51.505 | 27 |
| 2001 | 51.478 | 27 |
| 2000 | 51.452 | 29 |
| 1999 | 51.43 | 29 |
| 1998 | 51.41 | 28 |
| 1997 | 51.393 | 32 |
| 1996 | 51.376 | 33 |
| 1995 | 51.361 | 34 |
| 1994 | 51.348 | 33 |
| 1993 | 51.336 | 31 |
| 1992 | 51.325 | 33 |
| 1991 | 51.315 | 33 |
| 1990 | 51.305 | 35 |
| 1989 | 51.295 | 35 |
| 1988 | 51.285 | 35 |
| 1987 | 51.277 | 36 |
| 1986 | 51.273 | 36 |