| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.38 | 44 |
| 2015 | 4.13 | 55 |
| 2014 | 4.6 | 61 |
| 2013 | -.2 | 174 |
| 2012 | 3.84 | 88 |
| 2011 | -1.76 | 185 |
| 2010 | -7.04 | 197 |
| 2009 | -12.04 | 195 |
| 2008 | 0.05 | 174 |
| 2007 | 9.29 | 34 |
| 2006 | 12.8 | 10 |
| 2005 | 6.29 | 67 |
| 2004 | 5.81 | 80 |
| 2003 | 6.11 | 57 |
| 2002 | 1.09 | 147 |
| 2001 | -5.2 | 194 |
| 2000 | 6.08 | 43 |
| 1999 | 3.71 | 85 |
| 1998 | 4.73 | 67 |
| 1997 | 5.47 | 67 |
| 1996 | 6.6 | 47 |
| 1995 | -4.36 | 173 |
| 1994 | 6.68 | 36 |
| 1993 | 5.28 | 48 |
| 1992 | 1.16 | 101 |
| 1991 | 2.18 | 90 |
| 1990 | 3.01 | 91 |
| 1989 | 5.25 | 48 |
| 1988 | 5.21 | 72 |
| 1987 | 6.63 | 39 |
| 1986 | 11.49 | 8 |