| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.77 | 56 |
| 2015 | 1.98 | 69 |
| 2014 | 2.08 | 66 |
| 2013 | -.72 | 130 |
| 2012 | 0.05 | 116 |
| 2011 | -1.64 | 136 |
| 2010 | -.74 | 135 |
| 2009 | 0.98 | 55 |
| 2008 | 2.78 | 69 |
| 2007 | 2.15 | 97 |
| 2006 | 1.9 | 93 |
| 2005 | 2.32 | 99 |
| 2004 | 1.91 | 101 |
| 2003 | 2.32 | 73 |
| 2002 | 1.7 | 79 |
| 2001 | 2.43 | 56 |
| 2000 | 0.86 | 89 |
| 1999 | 1.77 | 71 |
| 1998 | 5.22 | 30 |
| 1997 | -1.19 | 108 |
| 1996 | 0.05 | 102 |
| 1995 | 0.37 | 83 |
| 1994 | -7.14 | 98 |
| 1993 | 2.12 | 43 |
| 1992 | -.43 | 65 |
| 1991 | -.85 | 70 |
| 1990 | -3.29 | 69 |
| 1989 | 0.07 | 65 |
| 1988 | 0.1 | 61 |
| 1987 | 0.57 | 57 |
| 1986 | 7.56 | 14 |