| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 9.94 | 60 |
| 2015 | 9.63 | 120 |
| 2014 | 9.65 | 131 |
| 2013 | 9.51 | 148 |
| 2012 | 9.22 | 149 |
| 2011 | 9.18 | 151 |
| 2010 | 9.5 | 150 |
| 2009 | 9.66 | 146 |
| 2008 | 10.81 | 142 |
| 2007 | 10.38 | 147 |
| 2006 | 10.01 | 142 |
| 2005 | 9.3 | 145 |
| 2004 | 8.98 | 138 |
| 2003 | 9.53 | 131 |
| 2002 | 9.19 | 134 |
| 2001 | 8.3 | 135 |
| 2000 | 7.99 | 131 |
| 1999 | 8.04 | 131 |
| 1998 | 8.03 | 127 |
| 1997 | 7.48 | 128 |
| 1996 | 7.33 | 129 |
| 1995 | 6.82 | 129 |
| 1994 | 6.33 | 120 |
| 1993 | 5.95 | 122 |
| 1992 | 5.74 | 119 |
| 1991 | 5.66 | 116 |
| 1990 | 6.28 | 112 |
| 1989 | 4.9 | 113 |
| 1988 | 4.83 | 111 |
| 1987 | 5.15 | 108 |
| 1986 | 5.67 | 104 |