| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 59.79 | 109 |
| 2015 | 58.65 | 111 |
| 2014 | 57.44 | 109 |
| 2013 | 56.17 | 112 |
| 2012 | 54.84 | 114 |
| 2011 | 53.46 | 119 |
| 2010 | 52.02 | 122 |
| 2009 | 50.52 | 126 |
| 2008 | 48.98 | 129 |
| 2007 | 47.39 | 133 |
| 2006 | 45.76 | 136 |
| 2005 | 44.08 | 138 |
| 2004 | 42.38 | 140 |
| 2003 | 40.65 | 142 |
| 2002 | 38.94 | 144 |
| 2001 | 37.25 | 148 |
| 2000 | 35.6 | 152 |
| 1999 | 34.99 | 153 |
| 1998 | 34.39 | 153 |
| 1997 | 33.79 | 153 |
| 1996 | 33.2 | 156 |
| 1995 | 32.59 | 156 |
| 1994 | 31.99 | 156 |
| 1993 | 31.39 | 156 |
| 1992 | 30.8 | 159 |
| 1991 | 29.64 | 163 |
| 1990 | 28.51 | 167 |
| 1989 | 27.41 | 166 |
| 1988 | 26.33 | 167 |
| 1987 | 25.28 | 169 |
| 1986 | 24.26 | 170 |