| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
1171.1 |
4 |
| 2015 |
1810.5 |
4 |
| 2014 |
1298.5 |
3 |
| 2013 |
768.6 |
4 |
| 2012 |
748.9 |
6 |
| 2011 |
961.4 |
7 |
| 2010 |
827.1 |
7 |
| 2009 |
542.8 |
6 |
| 2008 |
670.4 |
11 |
| 2007 |
621.2 |
12 |
| 2006 |
449 |
11 |
| 2005 |
409.6 |
9 |
| 2004 |
221.9 |
11 |
| 2003 |
185.7 |
12 |
| 2002 |
67.5 |
20 |
| 2001 |
312.9 |
7 |
| 2000 |
705 |
4 |
| 1999 |
245.8 |
10 |
| 1998 |
147.7 |
10 |