| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -4.86 | 132 |
| 2015 | 12.58 | 49 |
| 2014 | 3.95 | 130 |
| 2013 | 21.16 | 16 |
| 2012 | 7.02 | 103 |
| 2011 | 1.55 | 142 |
| 2010 | 14.46 | 68 |
| 2009 | 17.68 | 43 |
| 2008 | 19.65 | 54 |
| 2007 | 16.35 | 97 |
| 2006 | 35.31 | 26 |
| 2005 | 9.14 | 124 |
| 2004 | 3.38 | 147 |
| 2003 | 5.98 | 123 |
| 2002 | 8.81 | 98 |
| 2001 | 17.16 | 70 |
| 2000 | 1.37 | 144 |
| 1999 | -5.14 | 155 |
| 1998 | 15.53 | 51 |
| 1997 | 14.77 | 88 |
| 1996 | 17.15 | 69 |
| 1995 | 9.81 | 99 |
| 1994 | 10.89 | 103 |
| 1993 | 22.32 | 57 |
| 1992 | 10.58 | 86 |
| 1991 | 10.24 | 86 |
| 1990 | 9.74 | 85 |
| 1989 | 14.08 | 70 |
| 1988 | 26.61 | 35 |
| 1987 | 10.44 | 81 |
| 1986 | 14 | 61 |