| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.78 | 71 |
| 2015 | 49.99 | 69 |
| 2014 | 49.23 | 66 |
| 2013 | 48.63 | 62 |
| 2012 | 48.2 | 61 |
| 2011 | 47.92 | 60 |
| 2010 | 47.78 | 60 |
| 2009 | 48.14 | 62 |
| 2008 | 48.78 | 64 |
| 2007 | 49.61 | 68 |
| 2006 | 50.43 | 71 |
| 2005 | 51.07 | 71 |
| 2004 | 52.02 | 73 |
| 2003 | 52.68 | 72 |
| 2002 | 53.09 | 68 |
| 2001 | 53.44 | 68 |
| 2000 | 53.89 | 68 |
| 1999 | 54.45 | 69 |
| 1998 | 55.05 | 70 |
| 1997 | 55.58 | 69 |
| 1996 | 55.89 | 68 |
| 1995 | 55.9 | 68 |
| 1994 | 55.43 | 60 |
| 1993 | 54.65 | 58 |
| 1992 | 53.68 | 54 |
| 1991 | 52.73 | 52 |
| 1990 | 51.91 | 45 |
| 1989 | 51.54 | 38 |
| 1988 | 51.26 | 37 |
| 1987 | 51.08 | 37 |
| 1986 | 50.96 | 33 |