| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.89 | 30 |
| 2015 | -12.1 | 148 |
| 2014 | 1.61 | 92 |
| 2013 | 11.85 | 17 |
| 2012 | 5.82 | 50 |
| 2011 | 10.22 | 21 |
| 2010 | 8.17 | 25 |
| 2009 | 6.33 | 56 |
| 2008 | 4.88 | 65 |
| 2007 | 8.12 | 37 |
| 2006 | 7.63 | 41 |
| 2005 | 4.1 | 60 |
| 2004 | 0.57 | 114 |
| 2003 | 1.12 | 106 |
| 2002 | 2.78 | 83 |
| 2001 | 16.63 | 8 |
| 2000 | -6.35 | 127 |
| 1999 | -16.9 | 130 |
| 1998 | 25.2 | 7 |
| 1997 | 1.6 | 86 |
| 1996 | 17.9 | 13 |
| 1995 | 0.36 | 80 |
| 1994 | 0.82 | 71 |
| 1993 | -2.02 | 96 |
| 1992 | 5.65 | 30 |
| 1991 | 3.13 | 54 |
| 1990 | -2.9 | 81 |
| 1989 | -9.84 | 95 |
| 1988 | -1.31 | 79 |
| 1987 | -19.52 | 94 |
| 1986 | -5.37 | 89 |