| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4344 | 11 |
| 2015 | 4512 | 13 |
| 2014 | 5204 | 13 |
| 2013 | 5197 | 13 |
| 2012 | 5025 | 13 |
| 2011 | 4859 | 13 |
| 2010 | 4107 | 13 |
| 2009 | 3247 | 15 |
| 2008 | 4045 | 13 |
| 2007 | 3311 | 14 |
| 2006 | 2960 | 13 |
| 2005 | 2503 | 14 |
| 2004 | 2170 | 14 |
| 2003 | 1723 | 15 |
| 2002 | 1548 | 15 |
| 2001 | 1502 | 15 |
| 2000 | 1695 | 14 |
| 1999 | 1384 | 14 |
| 1998 | 1254 | 14 |
| 1997 | 1557 | 11 |
| 1996 | 1541 | 12 |
| 1995 | 1446 | 12 |
| 1994 | 1106 | 13 |
| 1993 | 920 | 14 |
| 1992 | 780 | 15 |
| 1991 | 706 | 14 |
| 1990 | 604 | 16 |
| 1989 | 513 | 16 |
| 1988 | 444 | 17 |
| 1987 | 337 | 17 |
| 1986 | 272 | 21 |