| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.18 | 50 |
| 2015 | 4 | 59 |
| 2014 | 5.63 | 43 |
| 2013 | 3.99 | 83 |
| 2012 | -.35 | 163 |
| 2011 | 2.54 | 128 |
| 2010 | 4.86 | 85 |
| 2009 | -4.36 | 161 |
| 2008 | -1.28 | 184 |
| 2007 | 8.35 | 47 |
| 2006 | 5.18 | 108 |
| 2005 | 3.17 | 145 |
| 2004 | 3.61 | 145 |
| 2003 | 1.63 | 155 |
| 2002 | 3.82 | 85 |
| 2001 | 2.53 | 113 |
| 2000 | 8.24 | 25 |
| 1999 | 8.48 | 19 |
| 1998 | 6.04 | 43 |
| 1997 | 5.71 | 60 |
| 1996 | 1.39 | 159 |
| 1995 | 1.43 | 148 |
| 1994 | 3.82 | 91 |
| 1993 | 4.2 | 65 |
| 1992 | 1.82 | 91 |
| 1991 | 8.64 | 16 |
| 1990 | 5.32 | 48 |
| 1989 | 9.8 | 15 |
| 1988 | 8.46 | 30 |
| 1987 | 3.95 | 71 |
| 1986 | 9.98 | 12 |