| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 1657 | 18 |
| 2014 | 1745 | 19 |
| 2013 | 1725 | 22 |
| 2012 | 1682 | 23 |
| 2011 | 1786 | 22 |
| 2010 | 1470 | 23 |
| 2009 | 1361 | 21 |
| 2008 | 1444 | 25 |
| 2007 | 1233 | 25 |
| 2006 | 1112 | 23 |
| 2005 | 1049 | 20 |
| 2004 | 1008 | 19 |
| 2003 | 910 | 18 |
| 2002 | 790 | 18 |
| 2001 | 723 | 18 |
| 2000 | 683 | 21 |
| 1999 | 754 | 16 |
| 1998 | 781 | 18 |
| 1997 | 780 | 19 |
| 1996 | 922 | 16 |
| 1995 | 993 | 14 |
| 1994 | 868 | 14 |
| 1993 | 762 | 14 |
| 1992 | 797 | 13 |
| 1991 | 785 | 13 |
| 1990 | 781 | 13 |