| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 4792 | 16 |
| 2014 | 5001 | 17 |
| 2013 | 4850 | 18 |
| 2012 | 4701 | 17 |
| 2011 | 4878 | 17 |
| 2010 | 4087 | 18 |
| 2009 | 3800 | 17 |
| 2008 | 3817 | 18 |
| 2007 | 3316 | 18 |
| 2006 | 2976 | 16 |
| 2005 | 2834 | 16 |
| 2004 | 2734 | 16 |
| 2003 | 2443 | 15 |
| 2002 | 2074 | 15 |
| 2001 | 1916 | 15 |
| 2000 | 1878 | 15 |
| 1999 | 1991 | 14 |
| 1998 | 2033 | 13 |
| 1997 | 1956 | 15 |
| 1996 | 2229 | 13 |
| 1995 | 2265 | 12 |
| 1994 | 1931 | 12 |
| 1993 | 1763 | 12 |
| 1992 | 1797 | 11 |
| 1991 | 1698 | 11 |
| 1990 | 1661 | 9 |