| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 6.3 | 32 |
| 2014 | 1.88 | 110 |
| 2013 | 6.74 | 37 |
| 2012 | -1.95 | 138 |
| 2011 | 8.15 | 31 |
| 2010 | -2.65 | 129 |
| 2009 | -8.09 | 155 |
| 2008 | -1.16 | 137 |
| 2007 | -4.9 | 146 |
| 2006 | 5 | 56 |
| 2005 | 0.85 | 107 |
| 2004 | 5.17 | 60 |
| 2003 | -4.31 | 145 |
| 2002 | 4.7 | 48 |
| 2001 | -5.69 | 150 |
| 2000 | -1.27 | 113 |
| 1999 | 13.62 | 11 |
| 1998 | -7.96 | 150 |
| 1997 | -10.32 | 148 |
| 1996 | 4.45 | 58 |
| 1995 | -3.2 | 114 |
| 1994 | 10.95 | 12 |
| 1993 | 0.78 | 76 |
| 1992 | 3.62 | 54 |
| 1991 | -1.65 | 91 |
| 1990 | -4.55 | 94 |
| 1989 | 18.01 | 3 |
| 1988 | -2.19 | 93 |
| 1987 | -6.56 | 94 |
| 1986 | 19.15 | 4 |