| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 10.62 | 54 |
| 2015 | 11.42 | 59 |
| 2014 | 8.59 | 86 |
| 2013 | -5.55 | 153 |
| 2012 | -.62 | 145 |
| 2011 | 1.32 | 145 |
| 2010 | -6 | 158 |
| 2009 | 0.46 | 144 |
| 2008 | 13.35 | 91 |
| 2007 | 15.96 | 102 |
| 2006 | 7.03 | 146 |
| 2005 | 11.57 | 99 |
| 2004 | 9.91 | 106 |
| 2003 | -.86 | 151 |
| 2002 | -1.62 | 147 |
| 2001 | 5.47 | 127 |
| 2000 | 5.54 | 124 |
| 1999 | -9.19 | 156 |
| 1998 | 12.61 | 70 |
| 1997 | -.34 | 146 |
| 1996 | 10.07 | 100 |
| 1995 | 13.3 | 87 |
| 1994 | 2.87 | 137 |
| 1993 | 5.21 | 111 |
| 1992 | -4.58 | 126 |
| 1991 | -.34 | 120 |
| 1990 | 5.63 | 96 |
| 1989 | 47.36 | 18 |
| 1988 | 5.2 | 104 |
| 1987 | -6.26 | 120 |
| 1986 | 25.73 | 28 |