| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 4.44 | 51 |
| 2014 | 1.05 | 154 |
| 2013 | 2.75 | 109 |
| 2012 | 3.01 | 104 |
| 2011 | 2.8 | 119 |
| 2010 | 2.39 | 135 |
| 2009 | 1.45 | 84 |
| 2008 | 4.12 | 95 |
| 2007 | 7.26 | 63 |
| 2006 | 12.07 | 12 |
| 2005 | 11.2 | 13 |
| 2004 | 5.77 | 81 |
| 2003 | 3.79 | 109 |
| 2002 | 1.42 | 142 |
| 2001 | 3.19 | 97 |
| 2000 | 5.91 | 47 |
| 1999 | 6.19 | 38 |
| 1998 | 0.16 | 164 |
| 1997 | 2.78 | 134 |
| 1996 | 7.84 | 25 |
| 1995 | 2.46 | 128 |
| 1994 | 0.72 | 145 |
| 1993 | -14.88 | 173 |
| 1992 | -11.58 | 169 |
| 1991 | -10.69 | 168 |
| 1990 | -2.95 | 146 |
| 1989 | 0.68 | 128 |
| 1988 | 3.71 | 99 |
| 1987 | -2.4 | 150 |
| 1986 | 0.1 | 130 |