| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 6219 | 12 |
| 2015 | 6903 | 14 |
| 2014 | 7645 | 14 |
| 2013 | 7525 | 14 |
| 2012 | 6915 | 14 |
| 2011 | 6820 | 14 |
| 2010 | 6195 | 14 |
| 2009 | 5333 | 15 |
| 2008 | 6454 | 13 |
| 2007 | 6079 | 13 |
| 2006 | 5606 | 10 |
| 2005 | 5101 | 9 |
| 2004 | 4491 | 9 |
| 2003 | 4244 | 9 |
| 2002 | 4461 | 8 |
| 2001 | 4352 | 8 |
| 2000 | 4009 | 8 |
| 1999 | 3405 | 10 |
| 1998 | 2959 | 10 |
| 1997 | 2805 | 11 |
| 1996 | 2312 | 12 |
| 1995 | 2079 | 13 |
| 1994 | 3258 | 6 |
| 1993 | 3076 | 6 |
| 1992 | 2168 | 8 |
| 1991 | 1854 | 10 |
| 1990 | 1532 | 10 |
| 1989 | 1286 | 6 |
| 1988 | 1009 | 7 |
| 1987 | 663 | 11 |
| 1986 | 653 | 9 |