| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 5.51 | 56 |
| 2014 | -4.85 | 186 |
| 2013 | 4.02 | 71 |
| 2012 | 4.69 | 67 |
| 2011 | 2.32 | 115 |
| 2010 | 2.94 | 101 |
| 2009 | 4.05 | 75 |
| 2008 | 4.5 | 96 |
| 2007 | -3.72 | 186 |
| 2006 | -3.75 | 189 |
| 2005 | -1.49 | 184 |
| 2004 | 10.57 | 18 |
| 2003 | 26.04 | 5 |
| 2002 | 46.49 | 1 |
| 2001 | 26.9 | 3 |
| 2000 | 8.32 | 24 |
| 1999 | 1.6 | 106 |
| 1998 | 1.24 | 125 |
| 1997 | 2.87 | 66 |
| 1996 | 2.46 | 55 |
| 1995 | 2.26 | 59 |
| 1994 | 2.29 | 46 |
| 1993 | 1.04 | 79 |
| 1992 | 0.1 | 119 |
| 1991 | 0.23 | 110 |
| 1990 | 0.54 | 93 |
| 1989 | 1.31 | 47 |
| 1988 | 0.09 | 106 |
| 1987 | 0.7 | 62 |
| 1986 | 2.64 | 18 |