| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 9582 | 1 |
| 2015 | 9773 | 1 |
| 2014 | 9497 | 1 |
| 2013 | 8930 | 1 |
| 2012 | 8064 | 1 |
| 2011 | 7144 | 1 |
| 2010 | 5814 | 1 |
| 2009 | 5001 | 1 |
| 2008 | 4714 | 1 |
| 2007 | 3653 | 1 |
| 2006 | 2924 | 1 |
| 2005 | 2661 | 1 |
| 2004 | 2526 | 1 |
| 2003 | 2050 | 1 |
| 2002 | 1956 | 1 |
| 2001 | 1873 | 1 |
| 2000 | 1778 | 1 |
| 1999 | 1757 | 1 |
| 1998 | 1766 | 1 |
| 1997 | 1721 | 1 |
| 1996 | 1669 | 1 |
| 1995 | 1439 | 1 |
| 1994 | 1099 | 1 |
| 1993 | 859 | 1 |
| 1992 | 911 | 1 |
| 1991 | 921 | 1 |
| 1990 | 959 | 1 |
| 1989 | 856 | 1 |
| 1988 | 788 | 2 |
| 1987 | 718 | 2 |
| 1986 | 801 | 1 |