| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.17 | 20 |
| 2015 | 15.841 | 27 |
| 2014 | 15.534 | 30 |
| 2013 | 12.434 | 46 |
| 2012 | 11.199 | 62 |
| 2011 | 9.782 | 78 |
| 2010 | 10.326 | 75 |
| 2009 | 15.285 | 41 |
| 2008 | 12.448 | 68 |
| 2007 | 8.94 | 104 |
| 2006 | 9.25 | 98 |
| 2005 | 13.61 | 58 |
| 2004 | 23.679 | 16 |
| 2003 | 58.941 | 4 |
| 2002 | 118.38 | 1 |
| 2001 | 48.556 | 4 |
| 2000 | 46.058 | 8 |
| 1999 | 50.027 | 9 |
| 1998 | 54.391 | 8 |
| 1997 | 67.185 | 7 |
| 1996 | 85.934 | 5 |
| 1995 | 93.054 | 7 |
| 1994 | 89.283 | 7 |
| 1993 | 91.396 | 7 |
| 1992 | 110.582 | 4 |
| 1991 | 143.557 | 3 |
| 1990 | 163.808 | 3 |
| 1989 | 119.8 | 3 |
| 1988 | 95.324 | 3 |
| 1987 | 89.956 | 1 |
| 1986 | 88.954 | 1 |