| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 51.39 | 75 |
| 2015 | 51.02 | 76 |
| 2014 | 50.2 | 71 |
| 2013 | 49.35 | 68 |
| 2012 | 48.48 | 65 |
| 2011 | 47.58 | 58 |
| 2010 | 46.66 | 49 |
| 2009 | 46.22 | 45 |
| 2008 | 45.82 | 44 |
| 2007 | 45.48 | 36 |
| 2006 | 45.2 | 33 |
| 2005 | 44.94 | 28 |
| 2004 | 44.96 | 24 |
| 2003 | 45.08 | 22 |
| 2002 | 45.27 | 19 |
| 2001 | 45.55 | 18 |
| 2000 | 45.89 | 15 |
| 1999 | 45.91 | 14 |
| 1998 | 45.98 | 12 |
| 1997 | 46.1 | 13 |
| 1996 | 46.32 | 13 |
| 1995 | 46.65 | 15 |
| 1994 | 47.12 | 17 |
| 1993 | 47.78 | 20 |
| 1992 | 48.58 | 24 |
| 1991 | 49.4 | 25 |
| 1990 | 50.15 | 32 |
| 1989 | 51.01 | 35 |
| 1988 | 51.81 | 41 |
| 1987 | 52.57 | 44 |
| 1986 | 53.4 | 45 |