| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.893 | 51 |
| 2015 | 50.918 | 50 |
| 2014 | 50.946 | 48 |
| 2013 | 50.975 | 47 |
| 2012 | 51.004 | 47 |
| 2011 | 51.027 | 46 |
| 2010 | 51.04 | 45 |
| 2009 | 51.041 | 46 |
| 2008 | 51.03 | 48 |
| 2007 | 51.01 | 48 |
| 2006 | 50.985 | 53 |
| 2005 | 50.959 | 54 |
| 2004 | 50.934 | 58 |
| 2003 | 50.909 | 59 |
| 2002 | 50.88 | 60 |
| 2001 | 50.84 | 64 |
| 2000 | 50.784 | 65 |
| 1999 | 50.709 | 71 |
| 1998 | 50.618 | 75 |
| 1997 | 50.519 | 87 |
| 1996 | 50.427 | 99 |
| 1995 | 50.352 | 103 |
| 1994 | 50.299 | 109 |
| 1993 | 50.266 | 111 |
| 1992 | 50.249 | 112 |
| 1991 | 50.237 | 112 |
| 1990 | 50.224 | 114 |
| 1989 | 50.205 | 116 |
| 1988 | 50.182 | 117 |
| 1987 | 50.157 | 116 |
| 1986 | 50.131 | 119 |