| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.05 | 24 |
| 2015 | -3.42 | 138 |
| 2014 | 2.16 | 103 |
| 2013 | 0.11 | 129 |
| 2012 | 4.84 | 48 |
| 2011 | 0.69 | 133 |
| 2010 | 6.59 | 38 |
| 2009 | -3.36 | 139 |
| 2008 | -3.24 | 146 |
| 2007 | 4.6 | 63 |
| 2006 | 9.12 | 15 |
| 2005 | 2.12 | 89 |
| 2004 | 2.29 | 106 |
| 2003 | 7.67 | 33 |
| 2002 | -2.5 | 136 |
| 2001 | 0.59 | 100 |
| 2000 | -1.32 | 116 |
| 1999 | 3.73 | 73 |
| 1998 | 8.06 | 28 |
| 1997 | 5.37 | 35 |
| 1996 | 2.2 | 93 |
| 1995 | 9.53 | 20 |
| 1994 | 5.37 | 34 |
| 1993 | 4.16 | 39 |
| 1992 | 5.02 | 41 |
| 1991 | 6.63 | 26 |
| 1990 | 8.66 | 23 |
| 1989 | 3.02 | 59 |
| 1988 | 2.39 | 66 |
| 1987 | 8.44 | 19 |
| 1986 | 4.79 | 34 |