| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 8231 | 9 |
| 2015 | 9037 | 10 |
| 2014 | 9584 | 11 |
| 2013 | 10361 | 11 |
| 2012 | 9992 | 11 |
| 2011 | 8960 | 12 |
| 2010 | 7502 | 12 |
| 2009 | 5942 | 13 |
| 2008 | 6800 | 12 |
| 2007 | 5488 | 15 |
| 2006 | 4758 | 14 |
| 2005 | 4464 | 13 |
| 2004 | 3943 | 12 |
| 2003 | 3000 | 13 |
| 2002 | 2526 | 13 |
| 2001 | 2431 | 13 |
| 2000 | 2673 | 13 |
| 1999 | 2502 | 13 |
| 1998 | 2538 | 12 |
| 1997 | 2759 | 12 |
| 1996 | 2504 | 11 |
| 1995 | 2293 | 11 |
| 1994 | 2014 | 10 |
| 1993 | 1949 | 8 |
| 1992 | 2011 | 9 |
| 1991 | 1993 | 8 |
| 1990 | 1848 | 7 |