| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 6.56 | 17 |
| 2015 | 1.63 | 133 |
| 2014 | 1.2 | 151 |
| 2013 | -1.93 | 184 |
| 2012 | 0.4 | 153 |
| 2011 | 5.78 | 62 |
| 2010 | 0.48 | 171 |
| 2009 | -4.81 | 168 |
| 2008 | 1.01 | 156 |
| 2007 | 6.32 | 87 |
| 2006 | 1.97 | 178 |
| 2005 | 4.16 | 118 |
| 2004 | 4.63 | 113 |
| 2003 | 4.52 | 88 |
| 2002 | 4.34 | 70 |
| 2001 | 6.94 | 23 |
| 2000 | 6.92 | 31 |
| 1999 | 2.19 | 127 |
| 1998 | 2.19 | 140 |
| 1997 | 0.64 | 167 |
| 1996 | 7.18 | 36 |
| 1995 | 6.67 | 42 |
| 1994 | -2.54 | 163 |
| 1993 | 4.1 | 67 |
| 1992 | -.2 | 128 |
| 1991 | -2.3 | 146 |
| 1990 | -4.42 | 154 |
| 1989 | 3.71 | 89 |
| 1988 | -1.44 | 147 |
| 1987 | 0.48 | 127 |
| 1986 | 5.5 | 46 |