| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.34 | 98 |
| 2015 | 0.86 | 105 |
| 2014 | 0.53 | 104 |
| 2013 | -.31 | 125 |
| 2012 | 0.48 | 110 |
| 2011 | -.74 | 128 |
| 2010 | -.63 | 133 |
| 2009 | -.68 | 86 |
| 2008 | -.45 | 115 |
| 2007 | 0.73 | 119 |
| 2006 | 1.14 | 112 |
| 2005 | -1.6 | 133 |
| 2004 | -.53 | 133 |
| 2003 | 1.06 | 98 |
| 2002 | 3.35 | 51 |
| 2001 | 2.59 | 53 |
| 2000 | 2.86 | 58 |
| 1999 | 4.57 | 31 |
| 1998 | 0.98 | 97 |
| 1997 | 1.36 | 87 |
| 1996 | 0.63 | 99 |
| 1995 | 6.47 | 27 |
| 1994 | 2.64 | 43 |
| 1993 | 0.69 | 66 |
| 1992 | -3.62 | 83 |
| 1991 | 5.6 | 22 |
| 1990 | 2.49 | 34 |
| 1989 | 3.82 | 28 |
| 1988 | 5.21 | 25 |
| 1987 | 3.91 | 26 |
| 1986 | 2.8 | 41 |