| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 846 | 5 |
| 2015 | 770 | 6 |
| 2014 | 1062 | 6 |
| 2013 | 1114 | 5 |
| 2012 | 1028 | 5 |
| 2011 | 1136 | 5 |
| 2010 | 909 | 5 |
| 2009 | 746 | 5 |
| 2008 | 775 | 4 |
| 2007 | 617 | 4 |
| 2006 | 484 | 5 |
| 2005 | 415 | 6 |
| 2004 | 379 | 8 |
| 2003 | 344 | 7 |
| 2002 | 278 | 9 |
| 2001 | 269 | 7 |
| 2000 | 311 | 5 |
| 1999 | 278 | 7 |
| 1998 | 410 | 5 |
| 1997 | 414 | 5 |
| 1996 | 406 | 4 |
| 1995 | 387 | 5 |
| 1994 | 476 | 4 |
| 1993 | 287 | 7 |
| 1992 | 272 | 7 |
| 1991 | 409 | 5 |
| 1990 | 318 | 7 |
| 1989 | 359 | 5 |
| 1988 | 302 | 4 |
| 1987 | 265 | 5 |
| 1986 | 266 | 5 |