| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.216 | 35 |
| 2015 | 51.226 | 36 |
| 2014 | 51.234 | 36 |
| 2013 | 51.241 | 36 |
| 2012 | 51.249 | 36 |
| 2011 | 51.263 | 36 |
| 2010 | 51.286 | 35 |
| 2009 | 51.319 | 32 |
| 2008 | 51.362 | 32 |
| 2007 | 51.407 | 30 |
| 2006 | 51.444 | 30 |
| 2005 | 51.467 | 29 |
| 2004 | 51.471 | 29 |
| 2003 | 51.459 | 29 |
| 2002 | 51.437 | 29 |
| 2001 | 51.415 | 31 |
| 2000 | 51.4 | 31 |
| 1999 | 51.394 | 31 |
| 1998 | 51.397 | 30 |
| 1997 | 51.409 | 30 |
| 1996 | 51.427 | 30 |
| 1995 | 51.452 | 27 |
| 1994 | 51.483 | 25 |
| 1993 | 51.523 | 23 |
| 1992 | 51.573 | 20 |
| 1991 | 51.634 | 19 |
| 1990 | 51.706 | 18 |
| 1989 | 51.783 | 19 |
| 1988 | 51.862 | 16 |
| 1987 | 51.954 | 15 |
| 1986 | 52.073 | 15 |