| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1714.89 | 52 |
| 2015 | 1796.4 | 52 |
| 2014 | 2346.48 | 46 |
| 2013 | 2346.48 | 47 |
| 2012 | 2180.01 | 47 |
| 2011 | 1857.5 | 51 |
| 2010 | 1385.17 | 54 |
| 2009 | 1116.61 | 56 |
| 2008 | 1316.14 | 56 |
| 2007 | 888.4 | 58 |
| 2006 | 651.4 | 62 |
| 2005 | 499.55 | 62 |
| 2004 | 366.28 | 64 |
| 1990 | 1798.86 | 20 |
| 1989 | 656.41 | 35 |
| 1988 | 625.03 | 32 |
| 1987 | 566.1 | 33 |
| 1986 | 471.28 | 33 |