| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.88 | 27 |
| 2015 | 0.69 | 105 |
| 2014 | -.19 | 136 |
| 2013 | 5.57 | 46 |
| 2012 | 1.49 | 107 |
| 2011 | 5.02 | 61 |
| 2010 | 8.6 | 22 |
| 2009 | 0.81 | 104 |
| 2008 | 0.09 | 130 |
| 2007 | 5.8 | 47 |
| 2006 | 4.16 | 70 |
| 2005 | 5.14 | 48 |
| 2004 | 0.18 | 130 |
| 2003 | 9.05 | 25 |
| 2002 | -6.6 | 155 |
| 2001 | 6.01 | 45 |
| 2000 | -.01 | 106 |
| 1999 | 2.67 | 88 |
| 1998 | 6.32 | 32 |
| 1997 | -2.55 | 126 |
| 1996 | 9.92 | 24 |
| 1995 | -.7 | 100 |
| 1994 | 4.72 | 38 |
| 1993 | 3.32 | 44 |
| 1992 | 6.65 | 31 |
| 1991 | -1.95 | 93 |
| 1990 | 4.02 | 51 |
| 1989 | 1.19 | 69 |
| 1988 | 15.64 | 11 |
| 1987 | -1.59 | 76 |
| 1986 | -.41 | 77 |