| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 39.09 | 155 |
| 2015 | 38.81 | 156 |
| 2014 | 38.53 | 156 |
| 2013 | 37.74 | 157 |
| 2012 | 36.1 | 159 |
| 2011 | 33.6 | 163 |
| 2010 | 32.63 | 163 |
| 2009 | 32.03 | 164 |
| 2008 | 31.83 | 164 |
| 2007 | 30.89 | 165 |
| 2006 | 29.22 | 166 |
| 2005 | 29.07 | 166 |
| 2004 | 27.59 | 170 |
| 2003 | 29.85 | 167 |
| 2002 | 30.66 | 167 |
| 2001 | 29.59 | 167 |
| 2000 | 30.2 | 167 |
| 1999 | 29.7 | 169 |
| 1998 | 29.11 | 168 |
| 1997 | 28.7 | 168 |
| 1996 | 28.49 | 170 |
| 1995 | 28.22 | 167 |
| 1994 | 28.14 | 167 |
| 1993 | 28.47 | 164 |
| 1992 | 28.35 | 163 |
| 1991 | 27.86 | 163 |
| 1990 | 27.01 | 166 |