| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 14.29 | 126 |
| 2015 | 14.45 | 150 |
| 2014 | 17.24 | 144 |
| 2013 | 17.11 | 147 |
| 2012 | 16.71 | 147 |
| 2011 | 16.84 | 148 |
| 2010 | 15.91 | 155 |
| 2009 | 15.81 | 154 |
| 2008 | 16.88 | 152 |
| 2007 | 17.15 | 151 |
| 2006 | 15.6 | 158 |
| 2005 | 16.34 | 152 |
| 2004 | 17.29 | 150 |
| 2003 | 24.53 | 104 |
| 2002 | 23.19 | 119 |
| 2001 | 24.09 | 111 |
| 2000 | 21.72 | 126 |
| 1999 | 19.03 | 134 |
| 1998 | 24.46 | 103 |
| 1997 | 29.03 | 78 |
| 1996 | 30.71 | 65 |
| 1995 | 32.15 | 57 |