| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.3 | 102 |
| 2015 | 2.63 | 108 |
| 2014 | 2.27 | 125 |
| 2013 | 1.36 | 145 |
| 2012 | 4.02 | 82 |
| 2011 | 4.04 | 95 |
| 2010 | 5.11 | 80 |
| 2009 | -4.7 | 165 |
| 2008 | 1.4 | 150 |
| 2007 | 3.2 | 157 |
| 2006 | 4.94 | 117 |
| 2005 | 3.03 | 148 |
| 2004 | 4.3 | 126 |
| 2003 | 1.42 | 157 |
| 2002 | 0.13 | 166 |
| 2001 | -.61 | 171 |
| 2000 | 5.3 | 74 |
| 1999 | 2.67 | 120 |
| 1998 | 4.7 | 69 |
| 1997 | 6.96 | 38 |
| 1996 | 5.87 | 57 |
| 1995 | -5.76 | 177 |
| 1994 | 4.73 | 68 |
| 1993 | 4.06 | 69 |
| 1992 | 3.63 | 67 |
| 1991 | 4.22 | 59 |
| 1990 | 5.07 | 54 |
| 1989 | 4.2 | 71 |
| 1988 | 1.25 | 128 |
| 1987 | 1.86 | 110 |
| 1986 | -3.75 | 151 |