| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.6 | 81 |
| 2015 | -.95 | 124 |
| 2014 | 3.26 | 77 |
| 2013 | -6.12 | 169 |
| 2012 | 1.45 | 108 |
| 2011 | 0.66 | 134 |
| 2010 | -3.44 | 135 |
| 2009 | 8.54 | 27 |
| 2008 | 2.95 | 95 |
| 2007 | 2.24 | 101 |
| 2006 | 2.15 | 97 |
| 2005 | 2.5 | 78 |
| 2004 | 3.07 | 93 |
| 2003 | 1.3 | 105 |
| 2002 | -1.29 | 126 |
| 2001 | 4.02 | 61 |
| 2000 | 1.13 | 94 |
| 1999 | 3.41 | 76 |
| 1998 | 2.14 | 79 |
| 1997 | 1.88 | 82 |
| 1996 | 2.5 | 89 |
| 1995 | 1.87 | 81 |
| 1994 | -.45 | 90 |
| 1993 | 3.22 | 48 |
| 1992 | 1.71 | 71 |
| 1991 | 0.51 | 78 |
| 1990 | 2.08 | 64 |
| 1989 | 5.21 | 37 |
| 1988 | 2.2 | 68 |
| 1987 | 2.51 | 52 |
| 1986 | 3.24 | 51 |