| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.45 | 173 |
| 2015 | 22.06 | 175 |
| 2014 | 24.44 | 175 |
| 2013 | 26.09 | 179 |
| 2012 | 24.79 | 179 |
| 2011 | 21.39 | 176 |
| 2010 | 19.86 | 173 |
| 2009 | 17.86 | 169 |
| 2008 | 11.26 | 148 |
| 2007 | 8.23 | 113 |
| 2006 | 8.45 | 114 |
| 2005 | 9.15 | 116 |
| 2004 | 11.09 | 135 |
| 2003 | 11.28 | 128 |
| 2002 | 11.15 | 126 |
| 2001 | 10.35 | 122 |
| 2000 | 13.78 | 145 |
| 1999 | 15.48 | 158 |
| 1998 | 18.67 | 169 |
| 1997 | 20.7 | 178 |
| 1996 | 22.14 | 179 |
| 1995 | 22.67 | 179 |
| 1994 | 24.21 | 180 |
| 1993 | 22.16 | 176 |
| 1992 | 17.7 | 162 |
| 1991 | 15.93 | 153 |