| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 37.98 | 10 |
| 2015 | 37.34 | 10 |
| 2014 | 36.8 | 10 |
| 2013 | 36.35 | 10 |
| 2012 | 36 | 10 |
| 2011 | 35.81 | 8 |
| 2010 | 35.8 | 8 |
| 2009 | 36.36 | 8 |
| 2008 | 36.94 | 8 |
| 2007 | 37.36 | 8 |
| 2006 | 37.56 | 8 |
| 2005 | 37.69 | 5 |
| 2004 | 38.01 | 5 |
| 2003 | 38.46 | 6 |
| 2002 | 39 | 6 |
| 2001 | 39.67 | 5 |
| 2000 | 40.45 | 5 |
| 1999 | 40.62 | 5 |
| 1998 | 40.89 | 5 |
| 1997 | 41.06 | 5 |
| 1996 | 40.82 | 5 |
| 1995 | 40.05 | 2 |
| 1994 | 39.53 | 1 |
| 1993 | 38.7 | 1 |
| 1992 | 37.81 | 1 |
| 1991 | 37.22 | 1 |
| 1990 | 37.1 | 1 |
| 1989 | 37.61 | 1 |
| 1988 | 38.58 | 1 |
| 1987 | 39.85 | 1 |
| 1986 | 41.06 | 1 |