| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 1.98 | 80 |
| 2014 | -.48 | 162 |
| 2013 | -2.4 | 177 |
| 2012 | 1.66 | 96 |
| 2011 | 1.52 | 129 |
| 2010 | 1.66 | 128 |
| 2009 | 1.5 | 49 |
| 2008 | 4.02 | 70 |
| 2007 | 0.99 | 157 |
| 2006 | 7.41 | 35 |
| 2005 | 2.7 | 112 |
| 2004 | 6.46 | 43 |
| 2003 | -.65 | 172 |
| 2002 | -1.42 | 162 |
| 2001 | 1 | 114 |
| 2000 | 6.91 | 22 |
| 1999 | 1.38 | 110 |
| 1998 | 7.57 | 17 |
| 1997 | 1.29 | 130 |
| 1996 | 1.35 | 128 |
| 1995 | 3.17 | 69 |
| 1994 | 5.35 | 30 |
| 1993 | -4.86 | 158 |
| 1992 | -4.77 | 143 |
| 1991 | 0.07 | 96 |
| 1990 | -12.2 | 162 |
| 1989 | 5.7 | 30 |
| 1988 | 4.25 | 55 |
| 1987 | 4.35 | 41 |
| 1986 | 6.5 | 20 |