| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.16 | 70 |
| 2015 | 1.63 | 80 |
| 2014 | 1.12 | 93 |
| 2013 | 1 | 96 |
| 2012 | 0.05 | 117 |
| 2011 | 1.1 | 104 |
| 2010 | 3.01 | 64 |
| 2009 | -.5 | 81 |
| 2008 | -.55 | 116 |
| 2007 | 3.03 | 85 |
| 2006 | 2.1 | 88 |
| 2005 | 2.36 | 98 |
| 2004 | 2.39 | 94 |
| 2003 | 1.93 | 79 |
| 2002 | 2.27 | 70 |
| 2001 | 0.46 | 99 |
| 2000 | 5.08 | 28 |
| 1999 | 3.95 | 40 |
| 1998 | 3.24 | 60 |
| 1997 | 2.75 | 61 |
| 1996 | 1.65 | 87 |
| 1995 | 0.54 | 82 |
| 1994 | 1.29 | 67 |
| 1993 | -3.46 | 90 |
| 1992 | -2.12 | 76 |
| 1991 | -.46 | 69 |
| 1990 | -1.43 | 64 |
| 1989 | 0.41 | 61 |
| 1988 | 2.38 | 47 |
| 1987 | 4.66 | 22 |
| 1986 | 4.54 | 22 |