| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.83 | 77 |
| 2015 | 0.15 | 129 |
| 2014 | -1.08 | 168 |
| 2013 | 0.7 | 155 |
| 2012 | 1.42 | 159 |
| 2011 | 3.4 | 130 |
| 2010 | 1.23 | 151 |
| 2009 | -2.25 | 174 |
| 2008 | 5.77 | 126 |
| 2007 | 5.85 | 77 |
| 2006 | 2.11 | 145 |
| 2005 | 1.7 | 150 |
| 2004 | 0.51 | 153 |
| 2003 | -.03 | 160 |
| 2002 | 2.23 | 109 |
| 2001 | 3.07 | 106 |
| 2000 | 0.73 | 141 |
| 1999 | 0.83 | 125 |
| 1998 | 1.16 | 133 |
| 1997 | 1.75 | 136 |
| 1996 | 2.75 | 123 |
| 1995 | 7.86 | 93 |
| 1994 | 32.29 | 41 |
| 1993 | -.59 | 146 |
| 1992 | -.11 | 132 |
| 1991 | -1.75 | 134 |
| 1990 | 0.33 | 130 |
| 1989 | 0.45 | 126 |
| 1988 | -1.83 | 128 |
| 1987 | -4.14 | 124 |
| 1986 | 6.18 | 63 |