| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -4.1 | 71 |
| 2015 | 1.47 | 134 |
| 2014 | 1.23 | 143 |
| 2013 | -.05 | 175 |
| 2012 | 5.27 | 58 |
| 2011 | 2.07 | 126 |
| 2010 | 5.05 | 59 |
| 2009 | 2.24 | 114 |
| 2008 | 4.45 | 98 |
| 2007 | 6.19 | 81 |
| 2006 | 3.44 | 112 |
| 2005 | 3.26 | 95 |
| 2004 | 1.86 | 118 |
| 2003 | 1.83 | 112 |
| 2002 | 1.54 | 117 |
| 2001 | 1.83 | 104 |
| 2000 | 4.86 | 55 |
| 1999 | 4.18 | 64 |
| 1998 | 2.82 | 85 |
| 1997 | 2.41 | 79 |
| 1996 | 1.94 | 72 |
| 1995 | 1.57 | 76 |
| 1994 | 2.15 | 50 |
| 1993 | 0.82 | 90 |
| 1992 | -.51 | 147 |
| 1991 | -.33 | 144 |
| 1990 | 0.84 | 71 |
| 1989 | 1.48 | 40 |
| 1988 | 0.27 | 90 |
| 1987 | 0.2 | 91 |
| 1986 | 1.29 | 35 |