| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 35.11 | 151 |
| 2015 | 35.27 | 150 |
| 2014 | 35.54 | 150 |
| 2013 | 35.85 | 150 |
| 2012 | 36.2 | 149 |
| 2011 | 36.59 | 146 |
| 2010 | 37 | 146 |
| 2009 | 37.28 | 142 |
| 2008 | 37.57 | 139 |
| 2007 | 37.85 | 135 |
| 2006 | 38.13 | 133 |
| 2005 | 37.67 | 134 |
| 2004 | 37.18 | 134 |
| 2003 | 36.62 | 136 |
| 2002 | 35.98 | 140 |
| 2001 | 35.24 | 141 |
| 2000 | 34.38 | 146 |
| 1999 | 33.15 | 147 |
| 1998 | 31.85 | 153 |
| 1997 | 30.49 | 157 |
| 1996 | 29.08 | 160 |
| 1995 | 27.65 | 163 |
| 1994 | 26 | 167 |
| 1993 | 24.38 | 167 |
| 1992 | 22.79 | 168 |
| 1991 | 21.27 | 171 |
| 1990 | 19.82 | 171 |