| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.06 | 60 |
| 2015 | 3.15 | 71 |
| 2014 | 3.17 | 79 |
| 2013 | 4.74 | 55 |
| 2012 | 4.94 | 46 |
| 2011 | 5.02 | 60 |
| 2010 | -.25 | 110 |
| 2009 | 3.8 | 58 |
| 2008 | 0.89 | 120 |
| 2007 | 5.88 | 46 |
| 2006 | 1.25 | 111 |
| 2005 | 2.13 | 88 |
| 2004 | 4.15 | 77 |
| 2003 | 2.51 | 87 |
| 2002 | 5.36 | 41 |
| 2001 | 1.16 | 95 |
| 2000 | 2.6 | 80 |
| 1999 | 2.1 | 98 |
| 1998 | 3.72 | 59 |
| 1997 | 2.94 | 69 |
| 1996 | 2.55 | 87 |
| 1995 | 3.51 | 64 |
| 1994 | 2.45 | 61 |
| 1993 | 2.21 | 59 |
| 1992 | 2.99 | 60 |
| 1991 | 3.1 | 48 |
| 1990 | 4.09 | 50 |
| 1989 | 3.07 | 58 |
| 1988 | 4.5 | 46 |
| 1987 | 3.9 | 42 |
| 1986 | -.79 | 82 |