| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.64 | 29 |
| 2015 | 3.42 | 42 |
| 2014 | 1.26 | 114 |
| 2013 | 0.43 | 138 |
| 2012 | 1.34 | 114 |
| 2011 | -1.18 | 174 |
| 2010 | 1.23 | 140 |
| 2009 | -.41 | 82 |
| 2008 | 0.88 | 134 |
| 2007 | 2.14 | 141 |
| 2006 | -.25 | 184 |
| 2005 | 2.85 | 107 |
| 2004 | 3.12 | 112 |
| 2003 | 3.94 | 64 |
| 2002 | -1.89 | 169 |
| 2001 | 2 | 87 |
| 2000 | 0.7 | 149 |
| 1999 | 3.85 | 49 |
| 1998 | 3.4 | 71 |
| 1997 | 0.63 | 148 |
| 1996 | -.57 | 164 |
| 1995 | 2.54 | 87 |
| 1994 | -2.84 | 154 |
| 1993 | -1.67 | 129 |
| 1992 | -1.78 | 121 |
| 1991 | -.53 | 103 |
| 1990 | -3.66 | 138 |
| 1989 | 0.85 | 99 |
| 1988 | -3.59 | 148 |
| 1987 | 2.9 | 59 |
| 1986 | 0.01 | 107 |