| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1705.6 | 3 |
| 2015 | 2424.9 | 2 |
| 2014 | 2681 | 1 |
| 2013 | 2909.3 | 2 |
| 2012 | 2412.1 | 2 |
| 2011 | 2800.7 | 2 |
| 2010 | 2437 | 2 |
| 2009 | 1310.6 | 2 |
| 2008 | 1715.3 | 5 |
| 2007 | 1562.5 | 4 |
| 2006 | 1240.8 | 4 |
| 2005 | 1041.1 | 4 |
| 2004 | 681.2 | 4 |
| 2003 | 579 | 3 |
| 2002 | 530.7 | 3 |
| 2001 | 470.5 | 6 |
| 2000 | 421 | 7 |
| 1999 | 387.5 | 7 |
| 1998 | 437.5 | 3 |
| 1997 | 442.4 | 2 |
| 1996 | 401.8 | 2 |
| 1995 | 358.5 | 2 |
| 1994 | 337.9 | 2 |
| 1993 | 275.2 | 2 |
| 1992 | 111.6 | 5 |
| 1991 | 43.7 | 10 |
| 1990 | 34.9 | 11 |
| 1989 | 33.9 | 9 |
| 1988 | 31.9 | 10 |
| 1987 | 23.1 | 11 |
| 1986 | 18.8 | 11 |