| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 11376 | 6 |
| 2015 | 11261 | 8 |
| 2014 | 15043 | 7 |
| 2013 | 14757 | 7 |
| 2012 | 14479 | 7 |
| 2011 | 15061 | 8 |
| 2010 | 12726 | 8 |
| 2009 | 9860 | 8 |
| 2008 | 9633 | 10 |
| 2007 | 8065 | 10 |
| 2006 | 6329 | 9 |
| 2005 | 5000 | 10 |
| 2004 | 3676 | 13 |
| 2003 | 3147 | 12 |
| 2002 | 2913 | 12 |
| 2001 | 3228 | 10 |
| 2000 | 3818 | 9 |
| 1999 | 3609 | 9 |
| 1998 | 5279 | 7 |
| 1997 | 5353 | 7 |
| 1996 | 5130 | 6 |
| 1995 | 4478 | 6 |
| 1994 | 2425 | 7 |
| 1993 | 1932 | 9 |
| 1992 | 1885 | 10 |
| 1991 | 2945 | 6 |
| 1990 | 2086 | 5 |
| 1989 | 2058 | 3 |
| 1988 | 1381 | 5 |
| 1987 | 1168 | 4 |
| 1986 | 1042 | 5 |