| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.62 | 90 |
| 2015 | -5.67 | 151 |
| 2014 | -.55 | 141 |
| 2013 | 0.71 | 121 |
| 2012 | 2.71 | 83 |
| 2011 | 6.3 | 50 |
| 2010 | -.46 | 114 |
| 2009 | -.24 | 111 |
| 2008 | 2.93 | 96 |
| 2007 | 1.9 | 107 |
| 2006 | 3.93 | 72 |
| 2005 | -.05 | 115 |
| 2004 | -1.11 | 143 |
| 2003 | 11.94 | 13 |
| 2002 | 0.12 | 109 |
| 2001 | 3.08 | 73 |
| 2000 | 6.8 | 33 |
| 1999 | 4.82 | 60 |
| 1998 | 0.7 | 98 |
| 1997 | -.48 | 110 |
| 1996 | 5.29 | 46 |
| 1995 | 1.28 | 86 |
| 1994 | 6.66 | 31 |
| 1993 | -13.9 | 126 |
| 1992 | 4.79 | 42 |
| 1991 | 7.26 | 23 |
| 1990 | -4.69 | 95 |
| 1989 | 9.6 | 15 |
| 1988 | 10.51 | 19 |
| 1987 | 0.07 | 71 |
| 1986 | 0.38 | 70 |