| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.24 | 121 |
| 2015 | 9.67 | 14 |
| 2014 | 12.65 | 9 |
| 2013 | 14.64 | 12 |
| 2012 | 14.84 | 9 |
| 2011 | 8.77 | 40 |
| 2010 | 4.29 | 95 |
| 2009 | -.41 | 78 |
| 2008 | -.79 | 133 |
| 2007 | 7.02 | 67 |
| 2006 | 6.29 | 72 |
| 2005 | 4.22 | 86 |
| 2004 | 15.26 | 15 |
| 2003 | 6.64 | 62 |
| 2002 | 3.46 | 87 |
| 2001 | 12.77 | 15 |
| 2000 | 1.49 | 125 |
| 1999 | 0.81 | 115 |
| 1998 | 2.79 | 91 |
| 1997 | 0.12 | 120 |
| 1996 | -1.93 | 136 |
| 1995 | 28.41 | 2 |
| 1994 | 2.29 | 89 |
| 1993 | -7.57 | 111 |
| 1992 | -9.56 | 113 |
| 1991 | -14.82 | 118 |
| 1990 | -27.71 | 114 |
| 1989 | 5.4 | 49 |
| 1988 | 6.98 | 37 |
| 1987 | 4.5 | 51 |
| 1986 | 6.59 | 37 |