| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4183 | 12 |
| 2015 | 4270 | 14 |
| 2014 | 4332 | 15 |
| 2013 | 4122 | 17 |
| 2012 | 4006 | 16 |
| 2011 | 3808 | 18 |
| 2010 | 3266 | 16 |
| 2009 | 2573 | 17 |
| 2008 | 3323 | 17 |
| 2007 | 3060 | 15 |
| 2006 | 2785 | 15 |
| 2005 | 2427 | 15 |
| 2004 | 2156 | 15 |
| 2003 | 1879 | 14 |
| 2002 | 1847 | 12 |
| 2001 | 1803 | 12 |
| 2000 | 1836 | 13 |
| 1999 | 1494 | 13 |
| 1998 | 1307 | 13 |
| 1997 | 1158 | 16 |
| 1996 | 954 | 16 |
| 1995 | 720 | 23 |
| 1994 | 842 | 17 |
| 1993 | 697 | 17 |
| 1992 | 737 | 16 |
| 1991 | 606 | 18 |
| 1990 | 518 | 19 |
| 1989 | 425 | 20 |
| 1988 | 340 | 20 |
| 1987 | 188 | 26 |
| 1986 | 174 | 25 |