| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3046 | 3 |
| 2015 | 2919 | 3 |
| 2014 | 3298 | 3 |
| 2013 | 3267 | 3 |
| 2012 | 2932 | 2 |
| 2011 | 2952 | 2 |
| 2010 | 2618 | 2 |
| 2009 | 2488 | 2 |
| 2008 | 2870 | 2 |
| 2007 | 2576 | 2 |
| 2006 | 2233 | 2 |
| 2005 | 2081 | 2 |
| 2004 | 1942 | 2 |
| 2003 | 1708 | 2 |
| 2002 | 1436 | 2 |
| 2001 | 1403 | 2 |
| 2000 | 1353 | 2 |
| 1999 | 1386 | 2 |
| 1998 | 1324 | 2 |
| 1997 | 1273 | 2 |
| 1996 | 1319 | 2 |
| 1995 | 1313 | 1 |
| 1994 | 1100 | 2 |
| 1993 | 1004 | 2 |
| 1992 | 1045 | 1 |
| 1991 | 886 | 2 |
| 1990 | 856 | 2 |
| 1989 | 661 | 2 |
| 1988 | 645 | 2 |
| 1987 | 596 | 2 |
| 1986 | 483 | 2 |