| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.21 | 68 |
| 2015 | 1 | 99 |
| 2014 | 2.09 | 65 |
| 2013 | 1.68 | 77 |
| 2012 | 2.67 | 65 |
| 2011 | 4.06 | 42 |
| 2010 | 2.72 | 67 |
| 2009 | 2.75 | 34 |
| 2008 | 6.27 | 34 |
| 2007 | 3.36 | 80 |
| 2006 | 5.26 | 50 |
| 2005 | 2.12 | 103 |
| 2004 | 3.23 | 80 |
| 2003 | 4.75 | 44 |
| 2002 | 2.27 | 71 |
| 2001 | -.01 | 106 |
| 2000 | 0.62 | 92 |
| 1999 | 0.46 | 88 |
| 1998 | 4.44 | 41 |
| 1997 | -5.46 | 119 |
| 1996 | 11.95 | 9 |
| 1995 | -5.43 | 111 |
| 1994 | 10.95 | 5 |
| 1993 | -3.18 | 88 |
| 1992 | -2.05 | 75 |
| 1991 | 12.23 | 10 |
| 1990 | 1.02 | 47 |
| 1989 | 2.94 | 36 |
| 1988 | 7.22 | 14 |
| 1987 | -.02 | 60 |
| 1986 | 9.44 | 11 |