| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.73 | 95 |
| 2015 | 3.36 | 41 |
| 2014 | 1.06 | 96 |
| 2013 | 1.69 | 76 |
| 2012 | 1.23 | 91 |
| 2011 | 2.03 | 86 |
| 2010 | 4.03 | 43 |
| 2009 | -4.07 | 128 |
| 2008 | -1.87 | 131 |
| 2007 | 1.82 | 103 |
| 2006 | 0.07 | 129 |
| 2005 | 1.01 | 117 |
| 2004 | 3.71 | 70 |
| 2003 | 2.23 | 76 |
| 2002 | 3.99 | 41 |
| 2001 | 3.82 | 36 |
| 2000 | 12.71 | 6 |
| 1999 | 8.2 | 9 |
| 1998 | -6.25 | 119 |
| 1997 | 2.39 | 68 |
| 1996 | 2.17 | 77 |
| 1995 | 0.56 | 81 |
| 1994 | 4.19 | 28 |
| 1993 | 8.81 | 10 |
| 1992 | 2.65 | 30 |
| 1991 | 3.14 | 34 |
| 1990 | 3.35 | 26 |
| 1989 | 5.21 | 22 |
| 1988 | 8.81 | 5 |
| 1987 | 8.53 | 11 |
| 1986 | 4.04 | 26 |