| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.73 | 19 |
| 2015 | 3.48 | 64 |
| 2014 | -6.16 | 166 |
| 2013 | -45.35 | 179 |
| 2012 | 2.66 | 85 |
| 2011 | 6.47 | 49 |
| 2010 | 2.04 | 79 |
| 2009 | -.89 | 116 |
| 2008 | 1.85 | 111 |
| 2007 | 2.39 | 95 |
| 2006 | 4.35 | 62 |
| 2005 | -3.38 | 131 |
| 2004 | 6.82 | 46 |
| 2003 | -1.05 | 124 |
| 2002 | 2.18 | 88 |
| 2001 | 10.26 | 24 |
| 2000 | 0.31 | 100 |
| 1999 | 4 | 70 |
| 1998 | 3.8 | 57 |
| 1997 | 6.4 | 27 |
| 1996 | 4.7 | 53 |
| 1995 | 5.1 | 47 |
| 1994 | 1.14 | 72 |
| 1993 | 2.58 | 56 |
| 1992 | 1.01 | 75 |
| 1991 | 2.38 | 58 |
| 1990 | -.27 | 79 |
| 1989 | 0.24 | 73 |
| 1988 | 2.1 | 70 |
| 1987 | -3.28 | 84 |
| 1986 | 3.99 | 41 |