| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 14.59 | 130 |
| 2015 | 14.45 | 132 |
| 2014 | 14.34 | 133 |
| 2013 | 14.25 | 133 |
| 2012 | 14.17 | 135 |
| 2011 | 14.09 | 136 |
| 2010 | 13.99 | 136 |
| 2009 | 13.24 | 135 |
| 2008 | 12.48 | 133 |
| 2007 | 11.73 | 129 |
| 2006 | 11.01 | 125 |
| 2005 | 10.33 | 119 |
| 2004 | 10.03 | 115 |
| 2003 | 9.76 | 111 |
| 2002 | 9.51 | 111 |
| 2001 | 9.26 | 111 |
| 2000 | 9.01 | 109 |
| 1999 | 8.79 | 107 |
| 1998 | 8.57 | 106 |
| 1997 | 8.35 | 105 |
| 1996 | 8.13 | 103 |
| 1995 | 7.93 | 101 |
| 1994 | 7.88 | 102 |
| 1993 | 7.85 | 102 |
| 1992 | 7.84 | 103 |
| 1991 | 7.83 | 107 |
| 1990 | 7.83 | 111 |
| 1989 | 7.81 | 111 |
| 1988 | 7.79 | 110 |
| 1987 | 7.78 | 109 |
| 1986 | 7.76 | 108 |