| 序号 | 时间 (年) |
数据 (亿美元) |
|---|---|---|
| 1 | 2016 | |
| 2 | 2015 | |
| 3 | 2014 | |
| 4 | 2013 | |
| 5 | 2012 | |
| 6 | 2011 | |
| 7 | 2010 | |
| 8 | 2009 | |
| 9 | 2008 | |
| 10 | 2007 | |
| 11 | 2006 | 8.44 |
| 12 | 2005 | 5.52 |
| 13 | 2004 | 3.67 |
| 14 | 2003 | 2.87 |
| 15 | 2002 | 3.39 |
| 16 | 2001 | 0.60 |
| 17 | 2000 | 1.02 |
| 18 | 1988 | -0.29 |
| 19 | 1987 | 0.25 |
| 20 | 1986 | 0.51 |
| 21 | 1985 | 0.31 |
| 22 | 1984 | 0.46 |
