| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 1743.2 | 53 |
| 2014 | 1992.7 | 50 |
| 2013 | 1875.1 | 54 |
| 2012 | 1749.7 | 54 |
| 2011 | 1658.5 | 51 |
| 2010 | 1432.2 | 50 |
| 2009 | 1185.2 | 52 |
| 2008 | 1336.1 | 52 |
| 2007 | 1371.5 | 49 |
| 2006 | 1120.4 | 48 |
| 2005 | 1163.8 | 41 |
| 2004 | 1036.1 | 41 |
| 2003 | 866.9 | 43 |
| 2002 | 646 | 48 |
| 2001 | 519.2 | 51 |
| 2000 | 510.6 | 49 |
| 1999 | 584.7 | 46 |
| 1998 | 554.8 | 47 |
| 1997 | 651.5 | 45 |
| 1996 | 690.3 | 43 |
| 1995 | 627.2 | 43 |
| 1994 | 538 | 43 |
| 1993 | 450.7 | 47 |
| 1992 | 403.4 | 46 |
| 1991 | 411.7 | 42 |
| 1990 | 450.8 | 42 |
| 1989 | 436 | 39 |
| 1988 | 433.8 | 37 |
| 1987 | 394.7 | 39 |
| 1986 | 304.5 | 40 |