| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -2.69 | 69 |
| 2015 | 14.55 | 14 |
| 2014 | 2.9 | 95 |
| 2013 | -3.64 | 182 |
| 2012 | 6.01 | 52 |
| 2011 | 2.98 | 100 |
| 2010 | 3.04 | 97 |
| 2009 | 8.83 | 31 |
| 2008 | 0.54 | 169 |
| 2007 | 10.2 | 40 |
| 2006 | 12.53 | 33 |
| 2005 | 0.65 | 164 |
| 2004 | 1.8 | 119 |
| 2003 | 5.6 | 40 |
| 2002 | 2.74 | 91 |
| 2001 | 3.5 | 69 |
| 2000 | 8.5 | 21 |
| 1999 | 4.29 | 62 |
| 1998 | 3.27 | 71 |
| 1997 | 2.55 | 75 |
| 1996 | 1.33 | 90 |
| 1995 | 1.22 | 88 |
| 1994 | 1.26 | 78 |
| 1993 | 0.65 | 100 |
| 1992 | 0.42 | 93 |
| 1991 | 1.09 | 63 |
| 1990 | 2.15 | 38 |
| 1989 | 1.24 | 50 |
| 1988 | 0.19 | 97 |
| 1987 | 1.2 | 43 |
| 1986 | 1.38 | 33 |