| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.12 | 107 |
| 2015 | 1.33 | 108 |
| 2014 | 0.47 | 144 |
| 2013 | 2.15 | 89 |
| 2012 | 1.66 | 97 |
| 2011 | 0.07 | 160 |
| 2010 | 4.17 | 67 |
| 2009 | -5.41 | 162 |
| 2008 | -1.14 | 169 |
| 2007 | 1.54 | 152 |
| 2006 | 1.36 | 164 |
| 2005 | 1.65 | 144 |
| 2004 | 2.17 | 135 |
| 2003 | 1.31 | 134 |
| 2002 | -.11 | 143 |
| 2001 | 0.16 | 140 |
| 2000 | 2.61 | 112 |
| 1999 | -.43 | 143 |
| 1998 | -1.4 | 165 |
| 1997 | 0.84 | 143 |
| 1996 | 2.84 | 92 |
| 1995 | 2.35 | 91 |
| 1994 | 0.52 | 116 |
| 1993 | -.08 | 100 |
| 1992 | 0.57 | 86 |
| 1991 | 3 | 45 |
| 1990 | 5.21 | 28 |
| 1989 | 4.94 | 34 |
| 1988 | 6.69 | 30 |
| 1987 | 3.6 | 48 |
| 1986 | 2.21 | 74 |