| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 15.77 | 120 |
| 2015 | 15.69 | 143 |
| 2014 | 15.94 | 148 |
| 2013 | 16.53 | 151 |
| 2012 | 16.21 | 151 |
| 2011 | 15.57 | 155 |
| 2010 | 15.66 | 156 |
| 2009 | 17.13 | 142 |
| 2008 | 17.72 | 145 |
| 2007 | 20.4 | 135 |
| 2006 | 22.56 | 117 |
| 2005 | 19.84 | 131 |
| 2004 | 22.55 | 121 |
| 2003 | 22.87 | 120 |
| 2002 | 21.79 | 125 |
| 2001 | 21.72 | 126 |
| 2000 | 20.99 | 129 |
| 1999 | 21.33 | 125 |
| 1998 | 20.1 | 129 |
| 1997 | 19.89 | 130 |
| 1996 | 20.84 | 123 |
| 1995 | 21.56 | 120 |