| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 38.08 | 88 |
| 2015 | 38.11 | 88 |
| 2014 | 38.42 | 88 |
| 2013 | 38.39 | 87 |
| 2012 | 38.69 | 85 |
| 2011 | 39.13 | 83 |
| 2010 | 39.63 | 81 |
| 2009 | 40.13 | 80 |
| 2008 | 37.24 | 100 |
| 2007 | 35.82 | 109 |
| 2006 | 32.7 | 128 |
| 2005 | 31.92 | 128 |
| 2004 | 31.33 | 134 |
| 2003 | 31.71 | 135 |
| 2002 | 31.73 | 135 |
| 2001 | 32.08 | 135 |
| 2000 | 32.19 | 132 |
| 1999 | 32.74 | 133 |
| 1998 | 34.17 | 130 |
| 1997 | 34.69 | 129 |
| 1996 | 35.23 | 133 |
| 1995 | 35.24 | 133 |
| 1994 | 38.84 | 110 |
| 1993 | 39.26 | 112 |
| 1992 | 39.17 | 114 |
| 1991 | 39.16 | 115 |