| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.85 | 121 |
| 2015 | 6.23 | 23 |
| 2014 | 7.36 | 16 |
| 2013 | 2.35 | 122 |
| 2012 | -1.16 | 176 |
| 2011 | 0.76 | 165 |
| 2010 | -.51 | 179 |
| 2009 | -6.61 | 184 |
| 2008 | 0.95 | 158 |
| 2007 | 6.15 | 93 |
| 2006 | -4.02 | 201 |
| 2005 | 13.27 | 7 |
| 2004 | -.65 | 197 |
| 2003 | 9.46 | 20 |
| 2002 | 3.44 | 95 |
| 2001 | -2.02 | 183 |
| 2000 | 4.89 | 81 |
| 1999 | 6.91 | 32 |
| 1998 | 11.74 | 10 |
| 1997 | 5.02 | 82 |
| 1996 | 4.44 | 90 |
| 1995 | 2.13 | 136 |
| 1994 | 1.69 | 132 |
| 1993 | -1.96 | 153 |
| 1992 | -.85 | 135 |
| 1991 | 1.39 | 105 |
| 1990 | 4.01 | 69 |
| 1989 | 3.77 | 87 |
| 1988 | 2.97 | 107 |
| 1987 | 9.1 | 23 |
| 1986 | 7.19 | 27 |