| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.15 | 46 |
| 2015 | 3.67 | 35 |
| 2014 | 1.97 | 67 |
| 2013 | 1.52 | 79 |
| 2012 | 0.94 | 100 |
| 2011 | 1.43 | 97 |
| 2010 | 1.21 | 101 |
| 2009 | -2.54 | 113 |
| 2008 | 2.02 | 79 |
| 2007 | 3.06 | 84 |
| 2006 | 2.33 | 84 |
| 2005 | 1.9 | 107 |
| 2004 | 1.45 | 106 |
| 2003 | 1.44 | 92 |
| 2002 | 0.96 | 91 |
| 2001 | 1.39 | 79 |
| 2000 | 1.16 | 85 |
| 1999 | 1.25 | 79 |
| 1998 | 2.26 | 74 |
| 1997 | 1.7 | 77 |
| 1996 | 0.5 | 100 |
| 1995 | 2.86 | 51 |
| 1994 | 2.44 | 46 |
| 1993 | 1.89 | 45 |
| 1992 | 2.28 | 37 |
| 1991 | 1.97 | 44 |
| 1990 | -.32 | 60 |
| 1989 | 0.64 | 55 |
| 1988 | 1.71 | 52 |
| 1987 | 1.49 | 46 |
| 1986 | -1.54 | 64 |