| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4494 | 2 |
| 2015 | 4332 | 2 |
| 2014 | 4309 | 2 |
| 2013 | 3294 | 2 |
| 2012 | 2803 | 3 |
| 2011 | 2468 | 3 |
| 2010 | 1398 | 6 |
| 2009 | 1451 | 6 |
| 2008 | 1555 | 6 |
| 2007 | 1283 | 6 |
| 2006 | 1003 | 8 |
| 2005 | 833 | 8 |
| 2004 | 723 | 8 |
| 2003 | 551 | 8 |
| 2002 | 463 | 8 |
| 2001 | 392 | 10 |
| 2000 | 361 | 10 |
| 1999 | 315 | 11 |
| 1998 | 270 | 11 |
| 1997 | 280 | 10 |
| 1996 | 224 | 12 |
| 1995 | 246 | 9 |
| 1994 | 158 | 10 |
| 1993 | 116 | 16 |
| 1992 | 92 | 19 |
| 1991 | 39 | 27 |
| 1990 | 41 | 25 |
| 1989 | 36 | 25 |
| 1988 | 33 | 25 |
| 1987 | 23 | 27 |
| 1986 | 20 | 29 |