| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.98 | 117 |
| 2015 | 1.27 | 109 |
| 2014 | 0.88 | 132 |
| 2013 | -.05 | 148 |
| 2012 | 2.52 | 75 |
| 2011 | 2.5 | 95 |
| 2010 | 3.49 | 83 |
| 2009 | -6.22 | 176 |
| 2008 | -.23 | 154 |
| 2007 | 1.59 | 151 |
| 2006 | 3.4 | 110 |
| 2005 | 1.63 | 145 |
| 2004 | 2.97 | 115 |
| 2003 | 0.19 | 155 |
| 2002 | -1.1 | 159 |
| 2001 | -1.9 | 165 |
| 2000 | 3.83 | 72 |
| 1999 | 1.15 | 119 |
| 1998 | 3.07 | 81 |
| 1997 | 5.21 | 42 |
| 1996 | 4.06 | 65 |
| 1995 | -7.46 | 176 |
| 1994 | 2.74 | 73 |
| 1993 | 2.03 | 71 |
| 1992 | 1.58 | 71 |
| 1991 | 2.17 | 57 |
| 1990 | 3.03 | 59 |
| 1989 | 2.19 | 74 |
| 1988 | -.7 | 127 |
| 1987 | -.13 | 110 |
| 1986 | -5.67 | 149 |