| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.94 | 66 |
| 2015 | 13.08 | 6 |
| 2014 | -16.03 | 173 |
| 2013 | 5.55 | 47 |
| 2012 | 2.44 | 91 |
| 2011 | 13.55 | 12 |
| 2010 | 1.69 | 83 |
| 2009 | -14.06 | 172 |
| 2008 | -6.87 | 163 |
| 2007 | -.94 | 130 |
| 2006 | 5.7 | 41 |
| 2005 | 11.72 | 14 |
| 2004 | -1.96 | 146 |
| 2003 | 5.99 | 43 |
| 2002 | 12.01 | 15 |
| 2001 | -2.13 | 124 |
| 2000 | 3.32 | 71 |
| 1999 | 3.31 | 78 |
| 1998 | 4.24 | 50 |
| 1997 | 4.95 | 37 |
| 1996 | -2.08 | 130 |
| 1995 | -8.41 | 127 |
| 1994 | -1.25 | 96 |
| 1993 | 4.03 | 41 |
| 1992 | 4.37 | 47 |
| 1991 | 3.46 | 45 |
| 1990 | 6.09 | 33 |
| 1989 | 5.2 | 38 |
| 1988 | 6.29 | 37 |
| 1987 | 14.53 | 12 |
| 1986 | 6.96 | 22 |