| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 38.55 | 13 |
| 2015 | 37.67 | 11 |
| 2014 | 36.97 | 11 |
| 2013 | 36.39 | 11 |
| 2012 | 35.94 | 9 |
| 2011 | 35.67 | 7 |
| 2010 | 35.59 | 7 |
| 2009 | 35.67 | 7 |
| 2008 | 35.95 | 7 |
| 2007 | 36.44 | 7 |
| 2006 | 37.17 | 6 |
| 2005 | 38.1 | 6 |
| 2004 | 39.47 | 7 |
| 2003 | 41.19 | 8 |
| 2002 | 43.09 | 13 |
| 2001 | 44.79 | 15 |
| 2000 | 46.07 | 17 |
| 1999 | 47.43 | 28 |
| 1998 | 48.25 | 31 |
| 1997 | 48.72 | 34 |
| 1996 | 49.35 | 36 |
| 1995 | 50.55 | 43 |
| 1994 | 50.93 | 42 |
| 1993 | 51.51 | 44 |
| 1992 | 52.18 | 48 |
| 1991 | 52.6 | 50 |
| 1990 | 52.47 | 50 |
| 1989 | 53.03 | 51 |
| 1988 | 53.6 | 49 |
| 1987 | 54.28 | 51 |
| 1986 | 55.18 | 54 |