| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 985 | 38 |
| 2012 | 941 | 40 |
| 2011 | 957 | 39 |
| 2010 | 952 | 34 |
| 2009 | 898 | 31 |
| 2008 | 826 | 36 |
| 2007 | 775 | 35 |
| 2006 | 756 | 29 |
| 2005 | 731 | 29 |
| 2004 | 706 | 27 |
| 2003 | 673 | 25 |
| 2002 | 649 | 21 |
| 2001 | 603 | 22 |
| 2000 | 503 | 27 |
| 1999 | 485 | 25 |
| 1998 | 479 | 24 |
| 1997 | 404 | 30 |
| 1996 | 387 | 30 |
| 1995 | 373 | 30 |
| 1994 | 350 | 24 |
| 1993 | 324 | 24 |
| 1992 | 298 | 28 |
| 1991 | 266 | 28 |
| 1990 | 255 | 31 |
| 1989 | 234 | 24 |
| 1988 | 221 | 24 |
| 1987 | 200 | 24 |
| 1986 | 180 | 21 |