| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.43 | 142 |
| 2015 | -.15 | 148 |
| 2014 | 2.66 | 73 |
| 2013 | 2.15 | 88 |
| 2012 | -1.09 | 163 |
| 2011 | 1.76 | 122 |
| 2010 | 3.69 | 76 |
| 2009 | 5.06 | 14 |
| 2008 | 4.39 | 62 |
| 2007 | 6.34 | 53 |
| 2006 | 1.66 | 155 |
| 2005 | 0.39 | 172 |
| 2004 | 2.6 | 125 |
| 2003 | 2.94 | 88 |
| 2002 | -.99 | 157 |
| 2001 | -7.57 | 193 |
| 2000 | -1.39 | 171 |
| 1999 | -.13 | 137 |
| 1998 | 0.76 | 130 |
| 1997 | 1.07 | 135 |
| 1996 | 5.19 | 44 |
| 1995 | 15.41 | 3 |
| 1994 | -10.62 | 170 |
| 1993 | 9.4 | 7 |
| 1992 | -8.18 | 155 |
| 1991 | 6.43 | 16 |
| 1990 | 1.85 | 74 |
| 1989 | -3.76 | 142 |
| 1988 | -3 | 145 |
| 1987 | -4.57 | 146 |
| 1986 | -5.64 | 148 |