| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 41.59 | 92 |
| 2015 | 46.36 | 93 |
| 2014 | 41 | 104 |
| 2013 | 36.48 | 112 |
| 2012 | 34.99 | 107 |
| 2011 | 37.56 | 105 |
| 2010 | 35.33 | 112 |
| 2009 | 38.47 | 101 |
| 2008 | 22.44 | 144 |
| 2007 | 18.39 | 154 |
| 2006 | 18.33 | 148 |
| 2005 | 15.9 | 153 |
| 2004 | 14.85 | 154 |
| 2003 | 16.81 | 141 |
| 2002 | 19.67 | 131 |
| 2001 | 20.99 | 122 |
| 2000 | 17.28 | 135 |
| 1999 | 22.85 | 109 |
| 1998 | 24.67 | 102 |
| 1997 | 22.62 | 106 |
| 1996 | 27.58 | 94 |
| 1995 | 40.1 | 63 |