| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.198 | 120 |
| 2015 | 4.496 | 126 |
| 2014 | 6.135 | 105 |
| 2013 | 6.759 | 105 |
| 2012 | 6.958 | 109 |
| 2011 | 5.955 | 117 |
| 2010 | 7.36 | 108 |
| 2009 | 10.718 | 83 |
| 2008 | 11.016 | 80 |
| 2007 | 9.893 | 94 |
| 2006 | 8.734 | 102 |
| 2005 | 7.97 | 107 |
| 2004 | 8.063 | 107 |
| 2003 | 8.178 | 108 |
| 2002 | 4.306 | 146 |
| 2001 | 5.164 | 143 |
| 2000 | 5.176 | 145 |
| 1999 | 3.945 | 147 |
| 1998 | 5.013 | 143 |
| 1997 | 6.078 | 134 |
| 1996 | 8.497 | 122 |
| 1995 | 10.047 | 109 |
| 1994 | 8.948 | 105 |
| 1993 | 12.778 | 76 |
| 1992 | 14.226 | 64 |
| 1991 | 14.376 | 57 |
| 1990 | 16.005 | 42 |
| 1989 | 15.841 | 41 |
| 1988 | 12.431 | 55 |
| 1987 | 16.362 | 24 |
| 1986 | 12.19 | 56 |