| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 38.83 | 134 |
| 2015 | 38.85 | 134 |
| 2014 | 38.85 | 134 |
| 2013 | 39.17 | 130 |
| 2012 | 39.43 | 128 |
| 2011 | 39.62 | 126 |
| 2010 | 39.73 | 124 |
| 2009 | 39.84 | 122 |
| 2008 | 39.96 | 122 |
| 2007 | 40.1 | 122 |
| 2006 | 40.26 | 121 |
| 2005 | 40.46 | 118 |
| 2004 | 40.71 | 116 |
| 2003 | 40.93 | 108 |
| 2002 | 41.09 | 104 |
| 2001 | 41.17 | 101 |
| 2000 | 40.73 | 102 |
| 1999 | 39.88 | 110 |
| 1998 | 38.9 | 111 |
| 1997 | 37.86 | 119 |
| 1996 | 36.84 | 127 |
| 1995 | 35.91 | 131 |
| 1994 | 35.07 | 133 |
| 1993 | 34.32 | 135 |
| 1992 | 33.65 | 137 |
| 1991 | 33.02 | 140 |
| 1990 | 32.25 | 144 |