| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 13303 | 2 |
| 2015 | 13190 | 3 |
| 2014 | 15179 | 3 |
| 2013 | 14822 | 3 |
| 2012 | 14138 | 3 |
| 2011 | 15004 | 3 |
| 2010 | 12661 | 3 |
| 2009 | 11233 | 2 |
| 2008 | 14066 | 2 |
| 2007 | 12508 | 2 |
| 2006 | 10776 | 2 |
| 2005 | 9351 | 2 |
| 2004 | 8573 | 2 |
| 2003 | 7248 | 2 |
| 2002 | 5863 | 2 |
| 2001 | 5873 | 2 |
| 2000 | 5959 | 2 |
| 1999 | 5792 | 2 |
| 1998 | 5637 | 2 |
| 1997 | 5371 | 2 |
| 1996 | 5530 | 2 |
| 1995 | 5582 | 2 |
| 1994 | 4619 | 2 |
| 1993 | 4197 | 2 |
| 1992 | 4838 | 2 |
| 1991 | 4514 | 2 |
| 1990 | 4080 | 2 |
| 1989 | 3206 | 2 |
| 1988 | 3004 | 2 |
| 1987 | 2727 | 2 |
| 1986 | 2266 | 2 |