| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 45.98 | 117 |
| 2015 | 46.33 | 124 |
| 2014 | 48.65 | 128 |
| 2013 | 56.31 | 108 |
| 2012 | 47.57 | 134 |
| 2011 | 44.81 | 155 |
| 2010 | 40.53 | 155 |
| 2009 | 33.11 | 168 |
| 2008 | 32.39 | 181 |
| 2007 | 33.98 | 178 |
| 2006 | 32.63 | 180 |
| 2005 | 31.63 | 175 |
| 2004 | 36.15 | 163 |
| 2003 | 29.62 | 172 |
| 2002 | 30.75 | 161 |
| 2001 | 31.25 | 162 |
| 2000 | 31.19 | 162 |
| 1999 | 31.16 | 155 |
| 1998 | 37.47 | 140 |
| 1997 | 33.46 | 153 |
| 1996 | 34.02 | 150 |
| 1995 | 30.72 | 161 |
| 1994 | 24.06 | 165 |
| 1993 | 24.79 | 142 |
| 1992 | 23.66 | 145 |
| 1991 | 20.38 | 144 |
| 1990 | 22.18 | 144 |
| 1989 | 18.58 | 141 |
| 1988 | 22.78 | 136 |
| 1987 | 24.85 | 131 |
| 1986 | 23.96 | 128 |