| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 7.835 | 10 |
| 2015 | -5.81 | 167 |
| 2014 | 4.352 | 76 |
| 2013 | 4.833 | 67 |
| 2012 | 2.725 | 119 |
| 2011 | 3.6 | 96 |
| 2010 | 3.6 | 102 |
| 2009 | 3.5 | 59 |
| 2008 | 13.337 | 11 |
| 2007 | 20.096 | 4 |
| 2006 | 7.447 | 59 |
| 2005 | 5.832 | 75 |
| 2004 | 13.295 | 12 |
| 2003 | 1.862 | 123 |
| 2002 | 10.116 | 13 |
| 2001 | 15.821 | 4 |
| 2000 | 5.477 | 51 |
| 1999 | -.033 | 128 |
| 1998 | 10.079 | 11 |
| 1997 | 1.511 | 128 |
| 1996 | -16.943 | 153 |
| 1995 | -3.585 | 120 |
| 1994 | 1.515 | 90 |
| 1993 | -2.779 | 117 |
| 1992 | -1.204 | 106 |
| 1991 | 2.324 | 65 |
| 1990 | 11.538 | 10 |
| 1989 | 3.852 | 57 |
| 1988 | 2.815 | 67 |
| 1987 | 2.288 | 77 |
| 1986 | 2.831 | 63 |