| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.76 | 54 |
| 2015 | 1.62 | 91 |
| 2014 | 3.33 | 58 |
| 2013 | 12.51 | 2 |
| 2012 | -2.56 | 176 |
| 2011 | 2.95 | 83 |
| 2010 | 11.6 | 4 |
| 2009 | -5.23 | 158 |
| 2008 | 4.94 | 51 |
| 2007 | 3.95 | 102 |
| 2006 | 3.25 | 114 |
| 2005 | 0.52 | 168 |
| 2004 | 2.31 | 129 |
| 2003 | 2.47 | 103 |
| 2002 | -1.87 | 168 |
| 2001 | -2.74 | 177 |
| 2000 | -4.26 | 185 |
| 1999 | -3.41 | 174 |
| 1998 | -2.07 | 170 |
| 1997 | 1.95 | 119 |
| 1996 | -.72 | 167 |
| 1995 | 4.36 | 48 |
| 1994 | 2.84 | 71 |
| 1993 | 2.41 | 63 |
| 1992 | -.81 | 112 |
| 1991 | 0.87 | 80 |
| 1990 | 1.41 | 81 |
| 1989 | 4.08 | 41 |
| 1988 | 3.03 | 81 |
| 1987 | 4.6 | 40 |
| 1986 | 2.02 | 78 |