| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 29.23 | 129 |
| 2015 | 28.58 | 131 |
| 2014 | 28.79 | 130 |
| 2013 | 29.81 | 126 |
| 2012 | 36.17 | 97 |
| 2011 | 30.97 | 123 |
| 2010 | 30.3 | 127 |
| 2009 | 33.29 | 115 |
| 2008 | 32.24 | 128 |
| 2007 | 33.91 | 121 |
| 2006 | 36.34 | 106 |
| 2005 | 36.64 | 105 |
| 2004 | 36.99 | 98 |
| 2003 | 36.05 | 105 |
| 2002 | 36.41 | 105 |
| 2001 | 38.76 | 101 |
| 2000 | 39.2 | 94 |
| 1999 | 39.28 | 98 |
| 1998 | 38.76 | 100 |
| 1997 | 37.79 | 104 |
| 1996 | 39.03 | 99 |
| 1995 | 40.18 | 100 |
| 1994 | 38.18 | 112 |
| 1993 | 38.58 | 114 |
| 1992 | 38.84 | 117 |
| 1991 | 38.09 | 123 |