| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.78 | 96 |
| 2015 | 0.07 | 113 |
| 2014 | -.85 | 128 |
| 2013 | 0.45 | 110 |
| 2012 | 2.17 | 74 |
| 2011 | 3.62 | 51 |
| 2010 | 2.46 | 72 |
| 2009 | -3.94 | 125 |
| 2008 | -.16 | 112 |
| 2007 | 5.1 | 55 |
| 2006 | 7.36 | 32 |
| 2005 | 4.78 | 56 |
| 2004 | 4.92 | 50 |
| 2003 | 1.58 | 86 |
| 2002 | 1.95 | 73 |
| 2001 | 2.54 | 54 |
| 2000 | 2.6 | 66 |
| 1999 | 0.24 | 92 |
| 1998 | 0.2 | 101 |
| 1997 | 1.55 | 82 |
| 1996 | 2.53 | 70 |
| 1995 | 3.71 | 42 |
| 1994 | 1.6 | 57 |
| 1993 | -.61 | 74 |
| 1992 | -3.86 | 84 |
| 1991 | -2.89 | 82 |
| 1990 | 0.56 | 53 |
| 1989 | 0.54 | 59 |
| 1988 | 3.12 | 38 |
| 1987 | 1.66 | 44 |
| 1986 | -2.07 | 67 |