| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 0.66 | 123 |
| 2014 | 2.89 | 93 |
| 2013 | 2.08 | 105 |
| 2012 | 0.44 | 117 |
| 2011 | -3.1 | 164 |
| 2010 | 11.3 | 29 |
| 2009 | -14.86 | 161 |
| 2008 | -1.05 | 138 |
| 2007 | 1.93 | 121 |
| 2006 | 2.59 | 125 |
| 2005 | 3.28 | 101 |
| 2004 | 3.11 | 112 |
| 2003 | 1.82 | 117 |
| 2002 | -1.93 | 141 |
| 2001 | -3.79 | 144 |
| 2000 | 2.67 | 110 |
| 1999 | -.74 | 128 |
| 1998 | -2.88 | 146 |
| 1997 | -.32 | 123 |
| 1996 | 4.16 | 74 |
| 1995 | 2.52 | 84 |
| 1994 | 3.46 | 78 |
| 1993 | -2.16 | 91 |
| 1992 | -1.88 | 95 |
| 1991 | 3.05 | 55 |
| 1990 | 8.04 | 26 |
| 1989 | 6.17 | 44 |
| 1988 | 8.76 | 29 |
| 1987 | 4.85 | 47 |
| 1986 | 1.08 | 81 |