| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 21.75 | 161 |
| 2015 | 18.96 | 167 |
| 2014 | 18.11 | 170 |
| 2013 | 14.85 | 178 |
| 2012 | 16.94 | 174 |
| 2011 | 19.68 | 165 |
| 2010 | 23.07 | 157 |
| 2009 | 25.94 | 146 |
| 2008 | 27.1 | 143 |
| 2007 | 26.89 | 146 |
| 2006 | 25.82 | 148 |
| 2005 | 25.74 | 147 |
| 2004 | 26.37 | 152 |
| 2003 | 24.75 | 159 |
| 2002 | 25.7 | 157 |
| 2001 | 27.03 | 155 |
| 2000 | 25.82 | 161 |
| 1999 | 27.9 | 153 |
| 1998 | 29.68 | 146 |
| 1997 | 32.26 | 144 |
| 1996 | 32.38 | 141 |
| 1995 | 32.11 | 141 |
| 1994 | 32.2 | 142 |
| 1993 | 32.85 | 142 |
| 1992 | 32.5 | 144 |
| 1991 | 26.63 | 162 |