| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.27 | 139 |
| 2015 | 3.04 | 53 |
| 2014 | 1.07 | 123 |
| 2013 | 3.01 | 67 |
| 2012 | 1.54 | 102 |
| 2011 | 3.8 | 69 |
| 2010 | 2.47 | 102 |
| 2009 | 2.96 | 33 |
| 2008 | 4.68 | 54 |
| 2007 | 2.33 | 136 |
| 2006 | 6.33 | 52 |
| 2005 | 2.08 | 135 |
| 2004 | 3.56 | 99 |
| 2003 | 4.7 | 56 |
| 2002 | 1.89 | 88 |
| 2001 | 6.03 | 23 |
| 2000 | 0.68 | 150 |
| 1999 | -.16 | 138 |
| 1998 | 5.88 | 26 |
| 1997 | -2.87 | 176 |
| 1996 | 10.78 | 5 |
| 1995 | -6.85 | 174 |
| 1994 | 8.79 | 9 |
| 1993 | -2.44 | 142 |
| 1992 | -3.84 | 137 |
| 1991 | 5.27 | 21 |
| 1990 | 1.5 | 79 |
| 1989 | 0.9 | 97 |
| 1988 | 9.69 | 14 |
| 1987 | -2.35 | 128 |
| 1986 | 6.95 | 17 |