| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 22.07 | 10 |
| 2015 | 12.51 | 50 |
| 2014 | -.34 | 148 |
| 2013 | 6.29 | 116 |
| 2012 | 12.58 | 64 |
| 2011 | 24 | 19 |
| 2010 | -.57 | 156 |
| 2009 | 17.41 | 46 |
| 2008 | 49.19 | 5 |
| 2007 | 38.04 | 26 |
| 2006 | 14.08 | 110 |
| 2005 | 29.01 | 31 |
| 2004 | 13.77 | 82 |
| 2003 | 6.5 | 118 |
| 2002 | 6.11 | 115 |
| 2001 | 4.32 | 137 |
| 2000 | 3.11 | 134 |
| 1999 | 7.4 | 123 |
| 1998 | 3.81 | 117 |
| 1997 | -3.7 | 147 |
| 1996 | 1.03 | 144 |
| 1995 | 9.56 | 100 |
| 1994 | 14 | 88 |
| 1993 | 5.94 | 106 |
| 1992 | 16.49 | 66 |
| 1991 | -1.09 | 122 |
| 1990 | 18.98 | 53 |
| 1989 | 11.29 | 84 |
| 1988 | -4.62 | 118 |
| 1987 | 3 | 106 |
| 1986 | -6.4 | 118 |