| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
1827 |
7 |
| 2015 |
1767 |
6 |
| 2014 |
1906 |
6 |
| 2013 |
1691 |
6 |
| 2012 |
1828 |
6 |
| 2011 |
1739 |
6 |
| 2010 |
1631 |
5 |
| 2009 |
1540 |
5 |
| 2008 |
1769 |
5 |
| 2007 |
1570 |
5 |
| 2006 |
1398 |
5 |
| 2005 |
1374 |
4 |
| 2004 |
1354 |
4 |
| 2003 |
1122 |
4 |
| 2002 |
1099 |
4 |
| 2001 |
1099 |
3 |
| 2000 |
1171 |
3 |
| 1999 |
1154 |
3 |
| 1998 |
1116 |
3 |
| 1997 |
1230 |
3 |
| 1996 |
1286 |
3 |