| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1554 | 8 |
| 2015 | 1543 | 8 |
| 2014 | 1592 | 8 |
| 2013 | 1468 | 8 |
| 2012 | 1307 | 8 |
| 2011 | 1181 | 8 |
| 2010 | 1010 | 10 |
| 2009 | 839 | 10 |
| 2008 | 910 | 11 |
| 2007 | 763 | 13 |
| 2006 | 662 | 13 |
| 2005 | 560 | 14 |
| 2004 | 505 | 11 |
| 2003 | 409 | 13 |
| 2002 | 340 | 14 |
| 2001 | 323 | 13 |
| 2000 | 303 | 14 |
| 1999 | 256 | 13 |
| 1998 | 204 | 14 |
| 1997 | 229 | 12 |
| 1996 | 228 | 11 |
| 1995 | 217 | 11 |
| 1994 | 138 | 15 |
| 1993 | 112 | 18 |
| 1992 | 94 | 18 |
| 1991 | 91 | 17 |
| 1990 | 86 | 17 |
| 1989 | 68 | 17 |
| 1988 | 57 | 16 |
| 1987 | 46 | 16 |
| 1986 | 38 | 19 |