| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 3886.2 | 31 |
| 2012 | 3739 | 32 |
| 2011 | 2840.5 | 35 |
| 2010 | 3502.4 | 29 |
| 2009 | 3376.3 | 28 |
| 2008 | 2849.4 | 33 |
| 2007 | 2164 | 36 |
| 2006 | 1571.1 | 38 |
| 2005 | 1175.9 | 40 |
| 2004 | 933 | 45 |
| 2003 | 693 | 48 |
| 2002 | 814.8 | 43 |
| 2001 | 1188.1 | 33 |
| 2000 | 1035.2 | 37 |
| 1999 | 943 | 37 |
| 1998 | 929.4 | 36 |
| 1997 | 796 | 42 |
| 1996 | 579 | 47 |
| 1995 | 709.4 | 41 |
| 1994 | 516.9 | 46 |
| 1993 | 582.5 | 39 |
| 1992 | 599.4 | 36 |
| 1991 | 491 | 37 |
| 1990 | 379.7 | 47 |
| 1989 | 366.3 | 44 |
| 1988 | 623.2 | 33 |
| 1987 | 462.2 | 34 |
| 1986 | 590.5 | 31 |