| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.82 | 8 |
| 2015 | 0.86 | 119 |
| 2014 | 0.39 | 146 |
| 2013 | -2.74 | 180 |
| 2012 | -.41 | 152 |
| 2011 | 4.96 | 49 |
| 2010 | -.26 | 163 |
| 2009 | -5.48 | 164 |
| 2008 | 0.33 | 145 |
| 2007 | 5.63 | 65 |
| 2006 | 1.31 | 165 |
| 2005 | 3.49 | 89 |
| 2004 | 3.97 | 87 |
| 2003 | 3.88 | 69 |
| 2002 | 3.74 | 51 |
| 2001 | 6.36 | 19 |
| 2000 | 6.4 | 30 |
| 1999 | 1.73 | 100 |
| 1998 | 1.73 | 115 |
| 1997 | 0.11 | 153 |
| 1996 | 6.47 | 30 |
| 1995 | 5.82 | 29 |
| 1994 | -3.45 | 159 |
| 1993 | 3.08 | 50 |
| 1992 | -1.1 | 113 |
| 1991 | -3.02 | 133 |
| 1990 | -4.93 | 150 |
| 1989 | 3.34 | 57 |
| 1988 | -1.69 | 133 |
| 1987 | 0.22 | 102 |
| 1986 | 5.14 | 29 |