| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.38 | 103 |
| 2015 | 1.45 | 106 |
| 2014 | 1.43 | 109 |
| 2013 | -.85 | 144 |
| 2012 | 1.74 | 102 |
| 2011 | -1.41 | 153 |
| 2010 | -2.76 | 153 |
| 2009 | -3.63 | 97 |
| 2008 | -.77 | 132 |
| 2007 | -.79 | 140 |
| 2006 | -2.23 | 153 |
| 2005 | 0.49 | 144 |
| 2004 | 3.02 | 115 |
| 2003 | 0.27 | 136 |
| 2002 | 0.9 | 113 |
| 2001 | 1.61 | 96 |
| 2000 | 3.73 | 97 |
| 1999 | -.02 | 123 |
| 1998 | -1.55 | 136 |
| 1997 | 6.05 | 60 |
| 1996 | 5.8 | 57 |
| 1995 | 5.33 | 53 |
| 1994 | 7.21 | 39 |
| 1993 | 1.43 | 67 |
| 1992 | 5.78 | 44 |
| 1991 | 3.27 | 53 |
| 1990 | 1.41 | 74 |
| 1989 | 6.04 | 46 |
| 1988 | 0.57 | 81 |
| 1987 | 4.78 | 49 |
| 1986 | 3.68 | 62 |