| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 36.94 | 146 |
| 2015 | 36.74 | 146 |
| 2014 | 36.45 | 145 |
| 2013 | 35.36 | 148 |
| 2012 | 33.45 | 151 |
| 2011 | 31.22 | 157 |
| 2010 | 30.34 | 158 |
| 2009 | 29.63 | 160 |
| 2008 | 29.7 | 161 |
| 2007 | 28.48 | 161 |
| 2006 | 26.82 | 163 |
| 2005 | 26.67 | 162 |
| 2004 | 25.38 | 163 |
| 2003 | 26.95 | 164 |
| 2002 | 28.14 | 164 |
| 2001 | 27.23 | 164 |
| 2000 | 28.23 | 163 |
| 1999 | 27.33 | 165 |
| 1998 | 27.07 | 164 |
| 1997 | 26.38 | 165 |
| 1996 | 26.03 | 166 |
| 1995 | 25.97 | 164 |
| 1994 | 26.07 | 164 |
| 1993 | 26.16 | 159 |
| 1992 | 25.84 | 162 |
| 1991 | 25.07 | 163 |