| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.84 | 5 |
| 2015 | 50.96 | 5 |
| 2014 | 51.07 | 5 |
| 2013 | 51.12 | 5 |
| 2012 | 51.15 | 5 |
| 2011 | 51.18 | 5 |
| 2010 | 51.21 | 5 |
| 2009 | 51.23 | 5 |
| 2008 | 51.25 | 5 |
| 2007 | 51.26 | 5 |
| 2006 | 51.25 | 4 |
| 2005 | 51.2 | 5 |
| 2004 | 51.07 | 4 |
| 2003 | 50.92 | 4 |
| 2002 | 50.76 | 5 |
| 2001 | 50.61 | 7 |
| 2000 | 50.49 | 6 |
| 1999 | 50.4 | 6 |
| 1998 | 50.32 | 7 |
| 1997 | 50.29 | 6 |
| 1996 | 50.23 | 6 |
| 1995 | 50.17 | 6 |
| 1994 | 50.07 | 8 |
| 1993 | 49.96 | 9 |
| 1992 | 49.86 | 9 |
| 1991 | 49.78 | 10 |
| 1990 | 49.72 | 10 |