| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -4.57 | 130 |
| 2015 | 3.44 | 118 |
| 2014 | 10.6 | 69 |
| 2013 | 19.59 | 23 |
| 2012 | 22.93 | 18 |
| 2011 | 17.09 | 44 |
| 2010 | 23.08 | 29 |
| 2009 | 16.89 | 53 |
| 2008 | 19.69 | 52 |
| 2007 | 39.54 | 22 |
| 2006 | 39.63 | 18 |
| 2005 | 42.86 | 10 |
| 2004 | 20.78 | 45 |
| 2003 | 5.52 | 124 |
| 2002 | 8.85 | 97 |
| 2001 | 38.45 | 27 |
| 2000 | 10.68 | 98 |
| 1999 | 11.35 | 98 |
| 1998 | 8.04 | 97 |
| 1997 | 9.86 | 104 |
| 1996 | 5.56 | 131 |
| 1995 | 1.1 | 141 |
| 1994 | 9.06 | 109 |
| 1993 | 12.4 | 84 |
| 1992 | 7.95 | 94 |
| 1991 | 2.35 | 111 |
| 1990 | -4.57 | 118 |
| 1989 | 13.93 | 72 |
| 1988 | -8.37 | 120 |
| 1987 | 8.6 | 88 |
| 1986 | 11.18 | 75 |