| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 20982 | 1 |
| 2015 | 22735 | 1 |
| 2014 | 23423 | 1 |
| 2013 | 22090 | 1 |
| 2012 | 20487 | 1 |
| 2011 | 18984 | 1 |
| 2010 | 15778 | 1 |
| 2009 | 12016 | 1 |
| 2008 | 14307 | 2 |
| 2007 | 12205 | 2 |
| 2006 | 9690 | 3 |
| 2005 | 7620 | 3 |
| 2004 | 5933 | 3 |
| 2003 | 4382 | 4 |
| 2002 | 3256 | 5 |
| 2001 | 2661 | 6 |
| 2000 | 2492 | 7 |
| 1999 | 1949 | 9 |
| 1998 | 1837 | 9 |
| 1997 | 1828 | 10 |
| 1996 | 1510 | 11 |
| 1995 | 1488 | 11 |
| 1994 | 1210 | 11 |
| 1993 | 917 | 11 |
| 1992 | 849 | 11 |
| 1991 | 719 | 11 |
| 1990 | 621 | 13 |
| 1989 | 525 | 12 |
| 1988 | 475 | 14 |
| 1987 | 394 | 14 |
| 1986 | 309 | 14 |