| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1962 | 20 |
| 2015 | 2087 | 19 |
| 2014 | 2369 | 22 |
| 2013 | 2421 | 22 |
| 2012 | 2609 | 19 |
| 2011 | 2437 | 18 |
| 2010 | 2016 | 18 |
| 2009 | 1655 | 18 |
| 2008 | 2003 | 20 |
| 2007 | 1653 | 20 |
| 2006 | 1393 | 20 |
| 2005 | 1253 | 20 |
| 2004 | 1094 | 18 |
| 2003 | 891 | 18 |
| 2002 | 727 | 19 |
| 2001 | 639 | 19 |
| 2000 | 715 | 20 |
| 1999 | 692 | 18 |
| 1998 | 646 | 19 |
| 1997 | 659 | 19 |
| 1996 | 654 | 22 |
| 1995 | 613 | 21 |
| 1994 | 534 | 21 |
| 1993 | 456 | 20 |
| 1992 | 438 | 19 |
| 1991 | 416 | 19 |
| 1990 | 420 | 19 |
| 1989 | 449 | 17 |
| 1988 | 361 | 18 |
| 1987 | 293 | 18 |
| 1986 | 261 | 17 |