| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 7.76 | 1 |
| 2015 | 1.58 | 94 |
| 2014 | -2.53 | 180 |
| 2013 | 3.09 | 65 |
| 2012 | 10.29 | 5 |
| 2011 | 4.28 | 60 |
| 2010 | 3.4 | 84 |
| 2009 | 0.67 | 64 |
| 2008 | 5.55 | 38 |
| 2007 | -1.1 | 188 |
| 2006 | 7.42 | 34 |
| 2005 | 1.73 | 143 |
| 2004 | 50.12 | 1 |
| 2003 | -34.9 | 201 |
| 2002 | -9.47 | 190 |
| 2001 | -.59 | 156 |
| 2000 | -1.55 | 172 |
| 1999 | 14.05 | 4 |
| 1998 | 30.72 | 1 |
| 1997 | 17.5 | 4 |
| 1996 | 7.63 | 20 |
| 1995 | -.97 | 147 |
| 1994 | 0.75 | 112 |
| 1993 | 26.5 | 1 |
| 1992 | 28.89 | 2 |
| 1991 | -65 | 175 |
| 1990 | 53.94 | 1 |
| 1989 | -5.33 | 151 |
| 1988 | -2.19 | 137 |
| 1987 | 6.93 | 28 |
| 1986 | 2.28 | 69 |