| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.01 | 152 |
| 2015 | 2.93 | 59 |
| 2014 | 4.01 | 37 |
| 2013 | 3.26 | 59 |
| 2012 | 2.82 | 67 |
| 2011 | 3.08 | 79 |
| 2010 | 4.28 | 61 |
| 2009 | -1.14 | 94 |
| 2008 | 1.36 | 117 |
| 2007 | 5.38 | 70 |
| 2006 | 5.85 | 57 |
| 2005 | 1.37 | 151 |
| 2004 | 11 | 11 |
| 2003 | 2.96 | 87 |
| 2002 | 3.26 | 60 |
| 2001 | -.62 | 157 |
| 2000 | 1.25 | 139 |
| 1999 | 0.73 | 128 |
| 1998 | 0.35 | 142 |
| 1997 | 1.11 | 134 |
| 1996 | 0.1 | 155 |
| 1995 | 0.85 | 132 |
| 1994 | -1.23 | 137 |
| 1993 | -4.5 | 157 |
| 1992 | 3.79 | 43 |
| 1991 | 4.4 | 31 |
| 1990 | -1.9 | 120 |
| 1989 | -2.42 | 137 |
| 1988 | -3.58 | 147 |
| 1987 | -.8 | 116 |
| 1986 | 0.79 | 100 |