| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 692.7 | 3 |
| 2015 | 664.2 | 4 |
| 2014 | 847 | 3 |
| 2013 | 883.5 | 3 |
| 2012 | 814.7 | 3 |
| 2011 | 702.4 | 3 |
| 2010 | 587.2 | 4 |
| 2009 | 515.3 | 5 |
| 2008 | 561.8 | 5 |
| 2007 | 435.3 | 5 |
| 2006 | 345.2 | 7 |
| 2005 | 273.4 | 8 |
| 2004 | 209.6 | 8 |
| 2003 | 169.7 | 9 |
| 2002 | 139.4 | 11 |
| 2001 | 116.8 | 11 |
| 2000 | 92.3 | 15 |
| 1999 | 64.7 | 18 |
| 1998 | 79.6 | 15 |
| 1997 | 175.8 | 8 |
| 1996 | 158.1 | 8 |
| 1995 | 160.8 | 8 |
| 1994 | 192 | 7 |
| 1993 | 195.4 | 7 |
| 1992 | 218.9 | 7 |