| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 49.14 | 103 |
| 2015 | 34.59 | 158 |
| 2014 | 42.24 | 145 |
| 2013 | 38.66 | 162 |
| 2012 | 37.01 | 166 |
| 2011 | 35.39 | 176 |
| 2010 | 37.43 | 164 |
| 2009 | 40.51 | 146 |
| 2008 | 36.1 | 174 |
| 2007 | 38.64 | 168 |
| 2006 | 36.82 | 172 |
| 2005 | 38.7 | 163 |
| 2004 | 37.25 | 160 |
| 2003 | 38.16 | 149 |
| 2002 | 32.84 | 158 |
| 2001 | 36.79 | 148 |
| 2000 | 43.26 | 130 |
| 1999 | 40.21 | 132 |
| 1998 | 35.42 | 149 |
| 1997 | 42.67 | 125 |
| 1996 | 39.43 | 131 |
| 1995 | 38.13 | 136 |
| 1994 | 37.3 | 128 |
| 1993 | 34.81 | 116 |
| 1992 | 33.66 | 122 |
| 1991 | 25.35 | 137 |
| 1990 | 24.15 | 141 |
| 1989 | 20.93 | 140 |
| 1988 | 24.98 | 133 |
| 1987 | 24.38 | 134 |
| 1986 | 21.08 | 132 |