| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 2.17 | 92 |
| 2014 | 1.18 | 113 |
| 2013 | 37.27 | 4 |
| 2012 | -25.64 | 178 |
| 2011 | 1.98 | 123 |
| 2010 | 6.53 | 70 |
| 2009 | 1.04 | 61 |
| 2008 | 14.09 | 15 |
| 2007 | -5.15 | 162 |
| 2006 | 0.66 | 140 |
| 2005 | -6.63 | 166 |
| 2004 | 10.02 | 36 |
| 2003 | 0.84 | 131 |
| 2002 | 2.26 | 103 |
| 2001 | 7.27 | 33 |
| 2000 | -5.44 | 149 |
| 1999 | 8.06 | 33 |
| 1998 | 1.21 | 110 |
| 1997 | 3.03 | 93 |
| 1996 | 7.41 | 36 |
| 1995 | 1.72 | 91 |
| 1994 | 3.94 | 71 |
| 1993 | 5.54 | 38 |
| 1992 | 10.17 | 22 |
| 1991 | -1.59 | 92 |
| 1990 | 3.05 | 54 |
| 1989 | 28.69 | 2 |
| 1988 | -6.5 | 104 |
| 1987 | -15.04 | 105 |
| 1986 | 11.55 | 13 |