| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.78 | 76 |
| 2015 | 1.01 | 98 |
| 2014 | -2.88 | 144 |
| 2013 | -1.48 | 136 |
| 2012 | 0.52 | 109 |
| 2011 | -1.16 | 132 |
| 2010 | -2.01 | 143 |
| 2009 | -2.67 | 116 |
| 2008 | 4.58 | 51 |
| 2007 | -2.56 | 140 |
| 2006 | -1.44 | 136 |
| 2005 | -7.39 | 139 |
| 2004 | 5.9 | 42 |
| 2003 | 3.25 | 60 |
| 2002 | -3.27 | 126 |
| 2001 | -.4 | 111 |
| 2000 | 0.91 | 88 |
| 1999 | 1.14 | 80 |
| 1998 | 1.23 | 92 |
| 1997 | 1.61 | 80 |
| 1996 | -1.77 | 111 |
| 1995 | -1.53 | 99 |
| 1994 | -2.45 | 88 |
| 1993 | 0.13 | 69 |
| 1992 | -5.41 | 91 |
| 1991 | -3.01 | 83 |
| 1990 | 5.97 | 15 |
| 1989 | -6.81 | 82 |
| 1988 | -1.98 | 73 |
| 1987 | -5.81 | 77 |
| 1986 | -3.4 | 72 |