| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -5.7 | 133 |
| 2015 | 35.19 | 4 |
| 2014 | 12.62 | 52 |
| 2013 | 20.79 | 19 |
| 2012 | 17.86 | 32 |
| 2011 | 21.7 | 24 |
| 2010 | 29.86 | 15 |
| 2009 | 7.66 | 102 |
| 2008 | 23.23 | 40 |
| 2007 | 25.27 | 50 |
| 2006 | 44.05 | 14 |
| 2005 | 3.25 | 154 |
| 2004 | 31.96 | 20 |
| 2003 | -99.88 | 163 |
| 2002 | 28.17 | 31 |
| 2001 | 108613.28 | 1 |
| 2000 | 73.76 | 5 |
| 1999 | 27.69 | 26 |
| 1998 | 25.61 | 20 |
| 1997 | 25.06 | 43 |
| 1996 | 35.01 | 28 |
| 1995 | 55.47 | 14 |
| 1994 | 59.19 | 20 |
| 1991 | 97.31 | 7 |
| 1990 | 47.88 | 20 |
| 1989 | 65.2 | 12 |
| 1988 | 61.61 | 12 |
| 1987 | 54.26 | 15 |
| 1986 | 93.25 | 8 |