| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4954 | 7 |
| 2015 | 5268 | 6 |
| 2014 | 5727 | 7 |
| 2013 | 5596 | 7 |
| 2012 | 5479 | 7 |
| 2011 | 5552 | 7 |
| 2010 | 4664 | 7 |
| 2009 | 3635 | 9 |
| 2008 | 4220 | 12 |
| 2007 | 3715 | 11 |
| 2006 | 3255 | 11 |
| 2005 | 2844 | 12 |
| 2004 | 2538 | 12 |
| 2003 | 1938 | 12 |
| 2002 | 1625 | 12 |
| 2001 | 1504 | 13 |
| 2000 | 1723 | 12 |
| 1999 | 1437 | 12 |
| 1998 | 1323 | 12 |
| 1997 | 1362 | 12 |
| 1996 | 1297 | 12 |
| 1995 | 1251 | 12 |
| 1994 | 960 | 13 |
| 1993 | 822 | 12 |
| 1992 | 766 | 12 |
| 1991 | 719 | 12 |
| 1990 | 650 | 11 |
| 1989 | 624 | 11 |
| 1988 | 607 | 11 |
| 1987 | 473 | 11 |
| 1986 | 347 | 13 |