| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4938 | 4 |
| 2015 | 4825 | 7 |
| 2014 | 4897 | 10 |
| 2013 | 4572 | 11 |
| 2012 | 4229 | 13 |
| 2011 | 4190 | 13 |
| 2010 | 3791 | 12 |
| 2009 | 3000 | 13 |
| 2008 | 3280 | 15 |
| 2007 | 3751 | 12 |
| 2006 | 3363 | 10 |
| 2005 | 3039 | 9 |
| 2004 | 2619 | 9 |
| 2003 | 2228 | 10 |
| 2002 | 1975 | 9 |
| 2001 | 1756 | 9 |
| 2000 | 1921 | 9 |
| 1999 | 1653 | 10 |
| 1998 | 1299 | 11 |
| 1997 | 1936 | 9 |
| 1996 | 2082 | 7 |
| 1995 | 1991 | 7 |
| 1994 | 1621 | 9 |
| 1993 | 1372 | 10 |
| 1992 | 1233 | 9 |
| 1991 | 1189 | 9 |
| 1990 | 999 | 9 |
| 1989 | 866 | 6 |
| 1988 | 709 | 6 |
| 1987 | 517 | 8 |
| 1986 | 396 | 11 |