| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.04 | 76 |
| 2015 | 2.84 | 82 |
| 2014 | 0.02 | 134 |
| 2013 | 1.55 | 114 |
| 2012 | 7.28 | 34 |
| 2011 | -4.1 | 167 |
| 2010 | 10.47 | 32 |
| 2009 | -1.96 | 88 |
| 2008 | 2.31 | 96 |
| 2007 | 6.61 | 73 |
| 2006 | 5.23 | 86 |
| 2005 | 5.24 | 65 |
| 2004 | 7.2 | 61 |
| 2003 | 9.05 | 44 |
| 2002 | 8.38 | 30 |
| 2001 | 2.32 | 85 |
| 2000 | 2.66 | 111 |
| 1999 | 6.71 | 41 |
| 1998 | -11.28 | 156 |
| 1997 | -4.04 | 144 |
| 1996 | 6.74 | 40 |
| 1995 | 10.52 | 20 |
| 1994 | 9.68 | 22 |
| 1993 | 14.27 | 7 |
| 1992 | 9.91 | 24 |
| 1991 | 12.13 | 15 |
| 1990 | 16.06 | 10 |
| 1989 | 17.48 | 7 |
| 1988 | 16.39 | 10 |
| 1987 | 14.13 | 10 |
| 1986 | 8.02 | 28 |