| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.94 | 25 |
| 2015 | 0.38 | 110 |
| 2014 | 2.26 | 99 |
| 2013 | -2.41 | 151 |
| 2012 | -7.96 | 156 |
| 2011 | 14.9 | 7 |
| 2010 | -4.77 | 143 |
| 2009 | -6.82 | 152 |
| 2008 | 6.85 | 50 |
| 2007 | 9.36 | 22 |
| 2006 | -1.27 | 133 |
| 2005 | -2.55 | 129 |
| 2004 | 8.35 | 40 |
| 2003 | -2.59 | 135 |
| 2002 | -1.56 | 127 |
| 2001 | -.52 | 111 |
| 2000 | -3.58 | 131 |
| 1999 | 4.55 | 63 |
| 1998 | 4.84 | 44 |
| 1997 | 0.44 | 99 |
| 1996 | 0.15 | 115 |
| 1995 | 0.27 | 92 |
| 1994 | 7.8 | 19 |
| 1993 | -1.83 | 92 |
| 1992 | -2.07 | 90 |
| 1991 | -2.99 | 97 |
| 1990 | 7.62 | 27 |
| 1989 | -.5 | 80 |
| 1988 | 3.05 | 57 |
| 1987 | -1.04 | 73 |
| 1986 | 2.06 | 60 |