| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1903 | 21 |
| 2015 | 1877 | 25 |
| 2014 | 2412 | 21 |
| 2013 | 2530 | 21 |
| 2012 | 2567 | 21 |
| 2011 | 2717 | 20 |
| 2010 | 2126 | 20 |
| 2009 | 1543 | 22 |
| 2008 | 1873 | 23 |
| 2007 | 1414 | 26 |
| 2006 | 1234 | 25 |
| 2005 | 1061 | 26 |
| 2004 | 866 | 26 |
| 2003 | 704 | 25 |
| 2002 | 650 | 24 |
| 2001 | 634 | 24 |
| 2000 | 639 | 25 |
| 1999 | 561 | 23 |
| 1998 | 559 | 22 |
| 1997 | 629 | 20 |
| 1996 | 603 | 21 |
| 1995 | 531 | 22 |
| 1994 | 475 | 20 |
| 1993 | 427 | 19 |
| 1992 | 428 | 20 |
| 1991 | 419 | 19 |
| 1990 | 398 | 20 |
| 1989 | 371 | 17 |
| 1988 | 332 | 18 |
| 1987 | 266 | 19 |
| 1986 | 226 | 16 |