| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 548 | 7 |
| 2015 | 559 | 9 |
| 2014 | 730 | 7 |
| 2013 | 742 | 7 |
| 2012 | 687 | 8 |
| 2011 | 694 | 7 |
| 2010 | 510 | 9 |
| 2009 | 499 | 9 |
| 2008 | 623 | 7 |
| 2007 | 491 | 8 |
| 2006 | 382 | 9 |
| 2005 | 325 | 11 |
| 2004 | 290 | 12 |
| 2003 | 237 | 13 |
| 2002 | 192 | 14 |
| 2001 | 180 | 13 |
| 2000 | 149 | 16 |
| 1999 | 129 | 17 |
| 1998 | 138 | 17 |
| 1997 | 238 | 12 |
| 1996 | 257 | 11 |
| 1995 | 265 | 10 |
| 1994 | 241 | 9 |
| 1993 | 329 | 4 |
| 1992 | 334 | 6 |
| 1991 | 713 | 3 |
| 1990 | 799 | 3 |
| 1989 | 790 | 3 |