| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 17408 | 4 |
| 2015 | 17032 | 6 |
| 2014 | 20023 | 6 |
| 2013 | 19790 | 5 |
| 2012 | 18893 | 5 |
| 2011 | 20138 | 5 |
| 2010 | 18752 | 5 |
| 2009 | 19113 | 5 |
| 2008 | 20428 | 4 |
| 2007 | 18443 | 5 |
| 2006 | 16042 | 5 |
| 2005 | 15171 | 5 |
| 2004 | 14551 | 5 |
| 2003 | 12641 | 5 |
| 2002 | 10169 | 5 |
| 2001 | 9300 | 5 |
| 2000 | 9127 | 5 |
| 1999 | 9943 | 5 |
| 1998 | 9954 | 5 |
| 1997 | 9611 | 5 |
| 1996 | 10574 | 3 |
| 1995 | 10492 | 3 |
| 1994 | 9158 | 3 |
| 1993 | 8675 | 3 |
| 1992 | 9011 | 3 |
| 1991 | 8062 | 3 |
| 1990 | 7955 | 2 |
| 1989 | 6409 | 2 |
| 1988 | 6313 | 2 |
| 1987 | 5766 | 2 |
| 1986 | 4721 | 2 |