| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.28 | 154 |
| 2015 | 1.3 | 144 |
| 2014 | 1.7 | 139 |
| 2013 | 2.49 | 116 |
| 2012 | 2.21 | 121 |
| 2011 | 3.28 | 110 |
| 2010 | 3.04 | 124 |
| 2009 | -1.54 | 121 |
| 2008 | 3.19 | 118 |
| 2007 | 5.36 | 110 |
| 2006 | 5.6 | 94 |
| 2005 | 5.28 | 94 |
| 2004 | 4.55 | 116 |
| 2003 | 2.95 | 127 |
| 2002 | 3.67 | 91 |
| 2001 | 2.74 | 107 |
| 2000 | 4.15 | 101 |
| 1999 | 2.36 | 125 |
| 1998 | 0.52 | 160 |
| 1997 | 2.65 | 138 |
| 1996 | 4.31 | 94 |
| 1995 | 3.12 | 112 |
| 1994 | 3.23 | 102 |
| 1993 | 1.23 | 114 |
| 1992 | -2.14 | 140 |
| 1991 | -1.02 | 136 |
| 1990 | -.32 | 128 |
| 1989 | 2.39 | 108 |
| 1988 | 4.2 | 90 |
| 1987 | 2.1 | 105 |
| 1986 | 0.02 | 131 |