| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4 | 56 |
| 2015 | -.8 | 175 |
| 2014 | 2.33 | 123 |
| 2013 | 1.97 | 134 |
| 2012 | 1.75 | 130 |
| 2011 | 1.22 | 159 |
| 2010 | 1.63 | 156 |
| 2009 | 3.31 | 53 |
| 2008 | 6.45 | 52 |
| 2007 | 5.17 | 112 |
| 2006 | 8.47 | 39 |
| 2005 | 5.3 | 91 |
| 2004 | 3.98 | 133 |
| 2003 | 4.29 | 92 |
| 2002 | -5.11 | 190 |
| 2001 | -3.49 | 189 |
| 2000 | 5.92 | 46 |
| 1999 | 0.33 | 153 |
| 1998 | 4.3 | 81 |
| 1997 | 4.91 | 85 |
| 1996 | 2.33 | 137 |
| 1995 | 1.01 | 152 |
| 1994 | 9.06 | 16 |
| 1993 | 0.75 | 119 |
| 1992 | 2.59 | 82 |
| 1991 | 3.14 | 72 |
| 1990 | 11.71 | 9 |
| 1989 | 1.53 | 117 |
| 1988 | -1.71 | 148 |
| 1987 | -2.89 | 151 |
| 1986 | -.13 | 132 |