| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 422 | 27 |
| 2014 | 449 | 28 |
| 2013 | 471 | 27 |
| 2012 | 455 | 26 |
| 2011 | 459 | 26 |
| 2010 | 411 | 26 |
| 2009 | 342 | 27 |
| 2008 | 458 | 25 |
| 2007 | 378 | 26 |
| 2006 | 324 | 24 |
| 2005 | 267 | 25 |
| 2004 | 229 | 23 |
| 2003 | 180 | 22 |
| 2002 | 166 | 24 |
| 2001 | 145 | 25 |
| 2000 | 153 | 24 |
| 1999 | 135 | 23 |
| 1998 | 119 | 24 |
| 1997 | 171 | 17 |
| 1996 | 193 | 13 |
| 1995 | 186 | 13 |
| 1994 | 152 | 13 |
| 1993 | 123 | 13 |
| 1992 | 103 | 17 |
| 1991 | 79 | 18 |
| 1990 | 62 | 20 |
| 1989 | 44 | 23 |
| 1988 | 35 | 24 |
| 1987 | 23 | 28 |
| 1986 | 18 | 32 |