| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.3 | 79 |
| 2015 | 1.89 | 91 |
| 2014 | 1.83 | 88 |
| 2013 | 4.2 | 57 |
| 2012 | 8.45 | 32 |
| 2011 | 3.36 | 62 |
| 2010 | 0.92 | 109 |
| 2009 | 12.19 | 32 |
| 2008 | 4.24 | 71 |
| 2007 | 4.92 | 68 |
| 2006 | 3.38 | 85 |
| 2005 | 3.97 | 63 |
| 2004 | 4.71 | 48 |
| 2003 | 1.47 | 95 |
| 2002 | 0.99 | 107 |
| 2001 | 4.87 | 52 |
| 2000 | 2.25 | 76 |
| 1999 | 6.8 | 31 |
| 1998 | -2.24 | 113 |
| 1997 | 0.33 | 100 |
| 1996 | -5.56 | 121 |
| 1995 | 0.95 | 74 |
| 1994 | 2.21 | 55 |
| 1993 | 2.16 | 65 |
| 1992 | -4.39 | 94 |
| 1991 | -1.54 | 94 |
| 1990 | -9.1 | 91 |
| 1989 | -6.81 | 91 |
| 1988 | 5.45 | 21 |
| 1987 | 0.88 | 62 |
| 1986 | 8.64 | 16 |