| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1403 | 28 |
| 2015 | 1385 | 31 |
| 2014 | 1623 | 29 |
| 2013 | 1606 | 29 |
| 2012 | 1644 | 28 |
| 2011 | 1770 | 28 |
| 2010 | 1489 | 27 |
| 2009 | 1199 | 27 |
| 2008 | 1685 | 26 |
| 2007 | 1532 | 23 |
| 2006 | 1275 | 24 |
| 2005 | 1117 | 24 |
| 2004 | 1004 | 20 |
| 2003 | 835 | 19 |
| 2002 | 670 | 20 |
| 2001 | 632 | 20 |
| 2000 | 729 | 18 |
| 1999 | 686 | 19 |
| 1998 | 684 | 18 |
| 1997 | 656 | 21 |
| 1996 | 669 | 21 |
| 1995 | 650 | 20 |
| 1994 | 555 | 18 |
| 1993 | 427 | 21 |
| 1992 | 500 | 18 |
| 1991 | 500 | 18 |
| 1990 | 543 | 15 |
| 1989 | 490 | 16 |
| 1988 | 456 | 15 |
| 1987 | 407 | 15 |
| 1986 | 327 | 14 |