| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.858 | 26 |
| 2015 | 6.096 | 27 |
| 2014 | 5.334 | 56 |
| 2013 | 2.53 | 112 |
| 2012 | 8.823 | 25 |
| 2011 | 3.82 | 94 |
| 2010 | 4.342 | 90 |
| 2009 | 5.044 | 43 |
| 2008 | 5.114 | 70 |
| 2007 | 9.712 | 42 |
| 2006 | 13.738 | 10 |
| 2005 | 7.592 | 54 |
| 2004 | 9.327 | 32 |
| 2003 | 2.529 | 117 |
| 2002 | 8.512 | 18 |
| 2001 | 3.748 | 84 |
| 2000 | 8.508 | 22 |
| 1999 | -.06 | 129 |
| 1998 | 2.891 | 100 |
| 1997 | 7.798 | 26 |
| 1996 | 13.856 | 6 |
| 1995 | 7.625 | 22 |
| 1994 | -4.944 | 121 |
| 1993 | -.354 | 102 |
| 1992 | -2.507 | 112 |
| 1991 | 5.211 | 36 |
| 1990 | -.121 | 86 |
| 1989 | 5.45 | 34 |
| 1988 | 2.472 | 71 |
| 1987 | 2.159 | 78 |
| 1986 | 5.299 | 31 |