| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 461.6 | 8 |
| 2015 | 411 | 8 |
| 2014 | 466.6 | 8 |
| 2013 | 490.2 | 7 |
| 2012 | 600.1 | 5 |
| 2011 | 607.6 | 5 |
| 2010 | 546.6 | 6 |
| 2009 | 514.7 | 6 |
| 2008 | 463.6 | 7 |
| 2007 | 405.3 | 7 |
| 2006 | 415.5 | 5 |
| 2005 | 443 | 5 |
| 2004 | 453.4 | 4 |
| 2003 | 424.9 | 4 |
| 2002 | 393.3 | 3 |
| 2001 | 407.6 | 2 |
| 2000 | 455.1 | 2 |
| 1999 | 431.2 | 2 |
| 1998 | 378.5 | 3 |
| 1997 | 406.3 | 3 |
| 1996 | 440.5 | 3 |
| 1995 | 499.6 | 2 |
| 1994 | 452.9 | 2 |
| 1993 | 413.5 | 3 |
| 1992 | 360 | 5 |
| 1991 | 327.9 | 5 |
| 1990 | 288 | 5 |
| 1989 | 279.7 | 5 |
| 1988 | 282.2 | 5 |
| 1987 | 236.4 | 5 |
| 1986 | 194.6 | 5 |