| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -14.73 | 135 |
| 2015 | -11.71 | 151 |
| 2014 | 13.66 | 47 |
| 2013 | 1.05 | 149 |
| 2012 | 19.83 | 26 |
| 2011 | 38.05 | 5 |
| 2010 | 31.96 | 10 |
| 2009 | 4.91 | 118 |
| 2008 | 32.97 | 17 |
| 2007 | 16.56 | 95 |
| 2006 | 47.08 | 11 |
| 2005 | 34.37 | 21 |
| 2004 | 20.1 | 51 |
| 2003 | -1.94 | 153 |
| 2002 | 12.68 | 79 |
| 2001 | -29.25 | 161 |
| 2000 | 58.52 | 9 |
| 1999 | 19.87 | 45 |
| 1998 | -12.78 | 150 |
| 1997 | 9.52 | 106 |
| 1996 | 15.7 | 76 |
| 1995 | -.05 | 143 |
| 1994 | 28.19 | 57 |
| 1993 | -26.56 | 138 |
| 1992 | 8.81 | 90 |
| 1991 | -4.8 | 125 |
| 1990 | 18.4 | 57 |
| 1989 | 3.09 | 114 |
| 1988 | -4.5 | 117 |
| 1987 | 5.96 | 94 |
| 1986 | -11.58 | 121 |