| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 41.5 | 148 |
| 2015 | 41.25 | 148 |
| 2014 | 41.02 | 148 |
| 2013 | 40.52 | 149 |
| 2012 | 46.25 | 130 |
| 2011 | 40.44 | 150 |
| 2010 | 41.82 | 148 |
| 2009 | 43.23 | 138 |
| 2008 | 44.65 | 134 |
| 2007 | 46.08 | 128 |
| 2006 | 47.52 | 115 |
| 2005 | 45.1 | 130 |
| 2004 | 42.71 | 137 |
| 2003 | 41.71 | 139 |
| 2002 | 40.7 | 140 |
| 2001 | 39.7 | 143 |
| 2000 | 38.72 | 145 |
| 1999 | 37.76 | 148 |
| 1998 | 36.81 | 148 |
| 1997 | 35.88 | 149 |
| 1996 | 34.95 | 151 |
| 1995 | 34.04 | 154 |
| 1994 | 33.14 | 158 |
| 1993 | 32.26 | 157 |
| 1992 | 31.38 | 159 |
| 1991 | 30.52 | 161 |
| 1990 | 29.68 | 160 |