| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 37.15 | 9 |
| 2015 | 36.74 | 9 |
| 2014 | 36.44 | 9 |
| 2013 | 36.32 | 9 |
| 2012 | 36.36 | 11 |
| 2011 | 36.48 | 10 |
| 2010 | 36.62 | 10 |
| 2009 | 36.93 | 10 |
| 2008 | 37.31 | 9 |
| 2007 | 37.71 | 9 |
| 2006 | 38.04 | 9 |
| 2005 | 38.3 | 7 |
| 2004 | 38.44 | 6 |
| 2003 | 38.36 | 5 |
| 2002 | 38.17 | 4 |
| 2001 | 38.17 | 4 |
| 2000 | 38.5 | 3 |
| 1999 | 38.76 | 3 |
| 1998 | 39.37 | 4 |
| 1997 | 40.18 | 4 |
| 1996 | 40.76 | 4 |
| 1995 | 40.85 | 5 |
| 1994 | 41.46 | 5 |
| 1993 | 41.81 | 4 |
| 1992 | 42.11 | 4 |
| 1991 | 42.81 | 4 |
| 1990 | 44.22 | 5 |
| 1989 | 45.55 | 10 |
| 1988 | 47.35 | 17 |
| 1987 | 49.41 | 22 |
| 1986 | 51.3 | 36 |