| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 38.05 | 99 |
| 2015 | 41.94 | 107 |
| 2014 | 42.57 | 99 |
| 2013 | 41.41 | 98 |
| 2012 | 40.86 | 96 |
| 2011 | 40.85 | 93 |
| 2010 | 40.31 | 97 |
| 2009 | 36.46 | 111 |
| 2008 | 36.11 | 103 |
| 2007 | 36.06 | 107 |
| 2006 | 34.6 | 103 |
| 2005 | 38.91 | 94 |
| 2004 | 39.33 | 88 |
| 2003 | 39.02 | 87 |
| 2002 | 38.16 | 86 |
| 2001 | 35.24 | 91 |
| 2000 | 35.16 | 82 |
| 1999 | 35.77 | 79 |
| 1998 | 35.81 | 78 |
| 1997 | 38.42 | 65 |
| 1996 | 35.79 | 72 |
| 1995 | 42.23 | 60 |
| 1994 | 38.02 | 65 |
| 1993 | 37.07 | 69 |
| 1992 | 36.52 | 65 |
| 1991 | 30.98 | 77 |
| 1990 | 29.58 | 74 |
| 1989 | 28.4 | 78 |
| 1988 | 28.9 | 77 |
| 1987 | 30.24 | 71 |
| 1986 | 30.39 | 71 |