| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1494 | 7 |
| 2015 | 1483 | 8 |
| 2014 | 1531 | 9 |
| 2013 | 1394 | 8 |
| 2012 | 1271 | 9 |
| 2011 | 1190 | 10 |
| 2010 | 1006 | 10 |
| 2009 | 816 | 14 |
| 2008 | 894 | 14 |
| 2007 | 740 | 13 |
| 2006 | 590 | 14 |
| 2005 | 462 | 17 |
| 2004 | 403 | 15 |
| 2003 | 311 | 16 |
| 2002 | 279 | 15 |
| 2001 | 259 | 14 |
| 2000 | 258 | 14 |
| 1999 | 240 | 14 |
| 1998 | 227 | 15 |
| 1997 | 262 | 12 |
| 1996 | 270 | 10 |
| 1995 | 259 | 8 |
| 1994 | 229 | 8 |
| 1993 | 185 | 10 |
| 1992 | 161 | 10 |
| 1991 | 137 | 12 |
| 1990 | 127 | 12 |
| 1989 | 96 | 12 |
| 1988 | 75 | 15 |
| 1987 | 57 | 15 |
| 1986 | 47 | 15 |