| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.36 | 88 |
| 2015 | -.04 | 129 |
| 2014 | -1.98 | 153 |
| 2013 | 4.77 | 61 |
| 2012 | 7.27 | 35 |
| 2011 | 19.66 | 7 |
| 2010 | 14.89 | 8 |
| 2009 | 9.66 | 19 |
| 2008 | -20.91 | 175 |
| 2007 | -3.77 | 157 |
| 2006 | -4.15 | 158 |
| 2005 | 1.16 | 137 |
| 2004 | 1.04 | 145 |
| 2003 | -16.63 | 167 |
| 2002 | -9.92 | 160 |
| 2001 | -10.21 | 162 |
| 2000 | -9.79 | 155 |
| 1999 | 8.69 | 27 |
| 1998 | -.31 | 129 |
| 1997 | 1.54 | 109 |
| 1996 | 9.46 | 22 |
| 1995 | -7.06 | 124 |
| 1994 | 15.44 | 7 |
| 1993 | -6.22 | 108 |
| 1992 | -5.07 | 105 |
| 1991 | 1.24 | 71 |
| 1990 | 3.99 | 48 |
| 1989 | 4.03 | 59 |
| 1988 | 6.71 | 38 |
| 1987 | 5.95 | 41 |