| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.18 | 77 |
| 2015 | 4.08 | 58 |
| 2014 | 2.6 | 114 |
| 2013 | 1.24 | 150 |
| 2012 | -.29 | 162 |
| 2011 | 2.66 | 123 |
| 2010 | 5.99 | 67 |
| 2009 | -5.18 | 171 |
| 2008 | -.56 | 178 |
| 2007 | 3.4 | 145 |
| 2006 | 4.69 | 127 |
| 2005 | 2.82 | 152 |
| 2004 | 4.32 | 124 |
| 2003 | 2.39 | 141 |
| 2002 | 2.07 | 127 |
| 2001 | 1.56 | 144 |
| 2000 | 4.74 | 83 |
| 1999 | 4.53 | 61 |
| 1998 | 4.23 | 84 |
| 1997 | 2.9 | 132 |
| 1996 | 1.52 | 157 |
| 1995 | 4.02 | 97 |
| 1994 | 4.09 | 76 |
| 1993 | -2.07 | 155 |
| 1992 | -1.16 | 136 |
| 1991 | -1.15 | 140 |
| 1990 | 0.75 | 114 |
| 1989 | 2.65 | 105 |
| 1988 | 2.56 | 113 |
| 1987 | 3.35 | 83 |
| 1986 | 2.69 | 100 |