| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.45 | 127 |
| 2015 | 0.89 | 116 |
| 2014 | 1.16 | 119 |
| 2013 | 0.51 | 136 |
| 2012 | -.15 | 148 |
| 2011 | 0.92 | 141 |
| 2010 | 1.42 | 134 |
| 2009 | -5.41 | 163 |
| 2008 | -1.09 | 166 |
| 2007 | 0.46 | 170 |
| 2006 | 3.57 | 106 |
| 2005 | 2.06 | 136 |
| 2004 | 2.4 | 127 |
| 2003 | 0.12 | 160 |
| 2002 | 0.15 | 138 |
| 2001 | 0.46 | 134 |
| 2000 | 3.4 | 84 |
| 1999 | 2.61 | 80 |
| 1998 | 1.85 | 113 |
| 1997 | 2.83 | 94 |
| 1996 | 2.32 | 101 |
| 1995 | 2.49 | 89 |
| 1994 | 4.98 | 35 |
| 1993 | -.32 | 105 |
| 1992 | 1.62 | 70 |
| 1991 | 1.13 | 77 |
| 1990 | 1.31 | 85 |
| 1989 | 0.58 | 107 |
| 1988 | -.06 | 119 |
| 1987 | 0.13 | 105 |
| 1986 | 4.76 | 34 |