| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.11 | 36 |
| 2015 | 1.5 | 94 |
| 2014 | 4.17 | 60 |
| 2013 | 0.95 | 119 |
| 2012 | 7.44 | 26 |
| 2011 | -2.3 | 160 |
| 2010 | 0.76 | 93 |
| 2009 | -2.5 | 127 |
| 2008 | 1.32 | 117 |
| 2007 | 3.98 | 69 |
| 2006 | 5.13 | 53 |
| 2005 | -4.78 | 141 |
| 2004 | 3.74 | 84 |
| 2003 | 2.89 | 81 |
| 2002 | -.4 | 119 |
| 2001 | 2.61 | 80 |
| 2000 | 1.69 | 90 |
| 1999 | 3.63 | 74 |
| 1998 | 1.58 | 86 |
| 1997 | 0.28 | 102 |
| 1996 | 4.98 | 49 |
| 1995 | -.88 | 101 |
| 1994 | 3.45 | 47 |
| 1993 | 0.48 | 78 |
| 1992 | -.97 | 83 |
| 1991 | 2.32 | 60 |
| 1990 | 5.63 | 38 |
| 1989 | -.13 | 76 |
| 1988 | -3.78 | 96 |
| 1987 | 1.37 | 62 |
| 1986 | -2.72 | 93 |