| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 28.93 | 159 |
| 2015 | 32.23 | 164 |
| 2014 | 36.02 | 167 |
| 2013 | 36 | 168 |
| 2012 | 39.72 | 163 |
| 2011 | 38.86 | 166 |
| 2010 | 38.09 | 162 |
| 2009 | 38.89 | 154 |
| 2008 | 49.43 | 140 |
| 2007 | 43.34 | 154 |
| 2006 | 44.92 | 146 |
| 2005 | 42.05 | 154 |
| 2004 | 44.17 | 143 |
| 2003 | 36.49 | 156 |
| 2002 | 28.11 | 167 |
| 2001 | 24.5 | 174 |
| 2000 | 25.24 | 173 |
| 1999 | 23.32 | 173 |
| 1998 | 25.93 | 167 |
| 1997 | 26.92 | 164 |
| 1996 | 27.88 | 163 |
| 1995 | 25.77 | 169 |
| 1994 | 26.89 | 161 |
| 1993 | 26.46 | 139 |
| 1992 | 29.1 | 130 |
| 1991 | 28.93 | 129 |
| 1990 | 32.65 | 118 |
| 1989 | 33.18 | 115 |
| 1988 | 31.19 | 117 |
| 1987 | 31.64 | 111 |
| 1986 | 33.3 | 106 |