| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | -11.9 | 147 |
| 2014 | -7.01 | 147 |
| 2013 | -10.26 | 156 |
| 2012 | -1.98 | 140 |
| 2011 | 4.57 | 49 |
| 2010 | 11.9 | 15 |
| 2009 | 0.72 | 125 |
| 2008 | 24.02 | 7 |
| 2007 | 56.8 | 3 |
| 2006 | 35.75 | 4 |
| 2005 | 10.47 | 22 |
| 2004 | 565.54 | 1 |
| 2003 | -23.93 | 143 |
| 2002 | 5.78 | 41 |
| 2001 | -12.08 | 142 |
| 2000 | 1.64 | 86 |
| 1999 | 1.67 | 91 |
| 1998 | 1.7 | 90 |
| 1997 | 1.73 | 83 |
| 1996 | 2.89 | 59 |
| 1995 | -.06 | 88 |
| 1994 | 1.43 | 64 |
| 1993 | 2.89 | 52 |
| 1992 | 2.88 | 49 |
| 1991 | 1.06 | 79 |
| 1990 | 1.97 | 59 |
| 1989 | 2.01 | 60 |
| 1988 | 2.05 | 50 |
| 1987 | 2.09 | 53 |
| 1986 | 2.14 | 56 |