| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 8.79 | 18 |
| 2014 | -2.9 | 156 |
| 2013 | 3.56 | 82 |
| 2012 | 4.51 | 58 |
| 2011 | 0.85 | 137 |
| 2010 | -1.31 | 148 |
| 2009 | 0.69 | 65 |
| 2008 | 4.06 | 77 |
| 2007 | 3.48 | 111 |
| 2006 | 13.41 | 28 |
| 2005 | 7.77 | 44 |
| 2004 | 3.32 | 109 |
| 2003 | 0.04 | 142 |
| 2002 | 0.45 | 119 |
| 2001 | -1.74 | 134 |
| 2000 | 7.73 | 46 |
| 1999 | 7.1 | 38 |
| 1998 | -6.34 | 149 |
| 1997 | 5.33 | 67 |
| 1996 | 13.77 | 14 |
| 1995 | 9.43 | 30 |
| 1994 | 4.99 | 54 |
| 1993 | -19.42 | 128 |
| 1992 | -27 | 126 |
| 1991 | -18.43 | 121 |
| 1990 | 1.95 | 66 |
| 1989 | 4.87 | 53 |
| 1988 | 7.5 | 36 |
| 1987 | -5.71 | 97 |
| 1986 | -4.5 | 99 |