| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -3.31 | 163 |
| 2015 | -.46 | 157 |
| 2014 | 1.21 | 115 |
| 2013 | 3.11 | 63 |
| 2012 | 1.48 | 107 |
| 2011 | 0.27 | 156 |
| 2010 | -.22 | 161 |
| 2009 | -1.18 | 95 |
| 2008 | 9.83 | 6 |
| 2007 | 18.3 | 2 |
| 2006 | 16.51 | 2 |
| 2005 | 14.11 | 3 |
| 2004 | 6.99 | 39 |
| 2003 | 1.6 | 128 |
| 2002 | -10.06 | 193 |
| 2001 | 0.89 | 121 |
| 2000 | -.07 | 159 |
| 1999 | 0.36 | 130 |
| 1998 | 3.94 | 56 |
| 1997 | 4.99 | 43 |
| 1996 | 8.07 | 16 |
| 1995 | 7.09 | 21 |
| 1994 | 0.23 | 126 |
| 1993 | -27.15 | 177 |
| 1992 | -9.88 | 161 |
| 1991 | -4.21 | 146 |
| 1990 | -3.12 | 132 |
| 1989 | -2.26 | 136 |
| 1988 | 2.89 | 83 |
| 1987 | 5.04 | 36 |
| 1986 | -.14 | 110 |