| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.14 | 82 |
| 2015 | 2.29 | 81 |
| 2014 | 2.14 | 80 |
| 2013 | 1.04 | 105 |
| 2012 | 3.48 | 70 |
| 2011 | 2.45 | 72 |
| 2010 | 1.71 | 90 |
| 2009 | 2.25 | 110 |
| 2008 | 3.03 | 94 |
| 2007 | 2.45 | 99 |
| 2006 | 3.4 | 84 |
| 2005 | 3.05 | 78 |
| 2004 | 2.39 | 84 |
| 2003 | -.54 | 123 |
| 2002 | -1.19 | 121 |
| 2001 | -3.13 | 130 |
| 2000 | 2.78 | 71 |
| 1999 | 1.76 | 87 |
| 1998 | -.76 | 102 |
| 1997 | 1.69 | 84 |
| 1996 | -.2 | 104 |
| 1995 | 0.63 | 77 |
| 1994 | 2.26 | 54 |
| 1993 | 11.1 | 14 |
| 1992 | 1.86 | 59 |
| 1991 | 5.43 | 37 |
| 1990 | 3.33 | 39 |
| 1989 | 2.2 | 58 |
| 1988 | 1.28 | 58 |
| 1987 | -1.21 | 75 |
| 1986 | 1.48 | 64 |