| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.53 | 163 |
| 2015 | 17.66 | 166 |
| 2014 | 18.87 | 169 |
| 2013 | 22.12 | 173 |
| 2012 | 23.9 | 176 |
| 2011 | 23 | 177 |
| 2010 | 19.2 | 170 |
| 2009 | 16.1 | 165 |
| 2008 | 13.63 | 159 |
| 2007 | 18.06 | 170 |
| 2006 | 20.85 | 177 |
| 2005 | 20.85 | 176 |
| 2004 | 18.5 | 166 |
| 2003 | 15.2 | 154 |
| 2002 | 13.8 | 145 |
| 2001 | 12.8 | 142 |
| 2000 | 12.6 | 136 |
| 1999 | 13.7 | 144 |
| 1998 | 13.7 | 146 |
| 1997 | 13.8 | 148 |
| 1996 | 13.2 | 141 |
| 1995 | 13.4 | 144 |
| 1994 | 22.57 | 176 |
| 1993 | 19.36 | 167 |
| 1992 | 16.44 | 156 |
| 1991 | 13.84 | 145 |