| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 48.6 | 140 |
| 2015 | 47.78 | 140 |
| 2014 | 46.94 | 138 |
| 2013 | 46.09 | 138 |
| 2012 | 45.23 | 138 |
| 2011 | 44.36 | 141 |
| 2010 | 43.48 | 142 |
| 2009 | 42.59 | 144 |
| 2008 | 41.7 | 144 |
| 2007 | 40.82 | 145 |
| 2006 | 39.94 | 147 |
| 2005 | 39.07 | 148 |
| 2004 | 38.21 | 149 |
| 2003 | 37.36 | 150 |
| 2002 | 36.51 | 151 |
| 2001 | 35.67 | 153 |
| 2000 | 34.84 | 155 |
| 1999 | 34.3 | 156 |
| 1998 | 33.77 | 156 |
| 1997 | 33.25 | 157 |
| 1996 | 32.73 | 158 |
| 1995 | 32.21 | 158 |
| 1994 | 31.69 | 158 |
| 1993 | 31.18 | 158 |
| 1992 | 30.68 | 160 |
| 1991 | 30.18 | 159 |
| 1990 | 29.68 | 159 |
| 1989 | 28.84 | 161 |
| 1988 | 28.02 | 161 |
| 1987 | 27.21 | 162 |
| 1986 | 26.41 | 164 |