| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3665 | 9 |
| 2015 | 3448 | 13 |
| 2014 | 3735 | 14 |
| 2013 | 3891 | 16 |
| 2012 | 4001 | 16 |
| 2011 | 3921 | 15 |
| 2010 | 3230 | 15 |
| 2009 | 2571 | 15 |
| 2008 | 2452 | 17 |
| 2007 | 2023 | 17 |
| 2006 | 1711 | 16 |
| 2005 | 1330 | 17 |
| 2004 | 1146 | 17 |
| 2003 | 1027 | 17 |
| 2002 | 870 | 17 |
| 2001 | 745 | 17 |
| 2000 | 758 | 17 |
| 1999 | 607 | 23 |
| 1998 | 432 | 25 |
| 1997 | 956 | 15 |
| 1996 | 988 | 15 |
| 1995 | 845 | 16 |
| 1994 | 719 | 15 |
| 1993 | 627 | 17 |
| 1992 | 512 | 19 |
| 1991 | 483 | 19 |
| 1990 | 418 | 21 |
| 1989 | 350 | 17 |
| 1988 | 305 | 17 |
| 1987 | 275 | 18 |