| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 2356 | 4 |
| 2015 | 2407 | 4 |
| 2014 | 2737 | 4 |
| 2013 | 2531 | 4 |
| 2012 | 2335 | 4 |
| 2011 | 2355 | 4 |
| 2010 | 2007 | 4 |
| 2009 | 1928 | 4 |
| 2008 | 2231 | 4 |
| 2007 | 1958 | 4 |
| 2006 | 1645 | 4 |
| 2005 | 1524 | 4 |
| 2004 | 1419 | 3 |
| 2003 | 1252 | 3 |
| 2002 | 1120 | 3 |
| 2001 | 999 | 3 |
| 2000 | 962 | 3 |
| 1999 | 1058 | 3 |
| 1998 | 893 | 3 |
| 1997 | 839 | 3 |
| 1996 | 901 | 2 |
| 1995 | 911 | 2 |
| 1994 | 810 | 2 |
| 1993 | 847 | 2 |
| 1992 | 907 | 2 |
| 1991 | 792 | 2 |
| 1990 | 762 | 2 |
| 1989 | 591 | 2 |
| 1988 | 540 | 2 |
| 1987 | 509 | 2 |
| 1986 | 437 | 2 |