| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 33.57 | 113 |
| 2015 | 34.78 | 104 |
| 2014 | 33.85 | 110 |
| 2013 | 32.39 | 116 |
| 2012 | 32.78 | 116 |
| 2011 | 31.17 | 122 |
| 2010 | 25.91 | 139 |
| 2009 | 29.56 | 133 |
| 2008 | 37.3 | 98 |
| 2007 | 35.24 | 113 |
| 2006 | 32.04 | 133 |
| 2005 | 29.79 | 137 |
| 2004 | 27.25 | 147 |
| 2003 | 27.07 | 150 |
| 2002 | 24.85 | 162 |
| 2001 | 27.73 | 151 |
| 2000 | 29.17 | 148 |
| 1999 | 29.8 | 145 |
| 1998 | 35.22 | 125 |
| 1997 | 36.17 | 121 |
| 1996 | 38.85 | 101 |
| 1995 | 41.22 | 92 |
| 1994 | 43.39 | 80 |
| 1993 | 44.42 | 75 |
| 1992 | 47.03 | 60 |
| 1991 | 50.07 | 53 |