| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 7587 | 10 |
| 2015 | 7473 | 13 |
| 2014 | 7670 | 13 |
| 2013 | 7053 | 15 |
| 2012 | 6607 | 15 |
| 2011 | 6452 | 15 |
| 2010 | 5870 | 15 |
| 2009 | 4968 | 16 |
| 2008 | 5534 | 15 |
| 2007 | 6110 | 12 |
| 2006 | 5488 | 11 |
| 2005 | 4811 | 11 |
| 2004 | 4037 | 11 |
| 2003 | 3645 | 11 |
| 2002 | 3250 | 10 |
| 2001 | 2815 | 11 |
| 2000 | 2900 | 11 |
| 1999 | 2510 | 12 |
| 1998 | 1956 | 14 |
| 1997 | 2831 | 10 |
| 1996 | 3017 | 8 |
| 1995 | 2752 | 9 |
| 1994 | 2252 | 9 |
| 1993 | 1908 | 10 |
| 1992 | 1709 | 12 |
| 1991 | 1546 | 13 |
| 1990 | 1309 | 12 |
| 1989 | 1136 | 9 |
| 1988 | 889 | 10 |
| 1987 | 663 | 10 |
| 1986 | 522 | 12 |