| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 890 | 34 |
| 2015 | 1039 | 33 |
| 2014 | 1447 | 32 |
| 2013 | 1560 | 30 |
| 2012 | 1610 | 29 |
| 2011 | 1604 | 30 |
| 2010 | 1307 | 30 |
| 2009 | 1168 | 29 |
| 2008 | 1718 | 27 |
| 2007 | 1364 | 28 |
| 2006 | 1222 | 26 |
| 2005 | 1038 | 27 |
| 2004 | 825 | 27 |
| 2003 | 683 | 26 |
| 2002 | 597 | 26 |
| 2001 | 592 | 25 |
| 2000 | 601 | 26 |
| 1999 | 455 | 28 |
| 1998 | 404 | 28 |
| 1997 | 485 | 28 |
| 1996 | 496 | 26 |
| 1995 | 420 | 28 |
| 1994 | 347 | 27 |
| 1993 | 319 | 26 |
| 1992 | 352 | 24 |
| 1991 | 341 | 23 |
| 1990 | 340 | 22 |
| 1989 | 271 | 23 |
| 1988 | 224 | 23 |
| 1987 | 215 | 23 |
| 1986 | 181 | 24 |