| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 3710.06 | 33 |
| 2012 | 3812.86 | 32 |
| 2011 | 3164.82 | 35 |
| 2010 | 3931.91 | 28 |
| 2009 | 3297.88 | 30 |
| 2008 | 3159.53 | 31 |
| 2007 | 2303.64 | 37 |
| 2006 | 1834.78 | 38 |
| 2005 | 1455.1 | 39 |
| 2004 | 1124.53 | 43 |
| 2003 | 836.21 | 46 |
| 2002 | 928.94 | 41 |
| 2001 | 1229.04 | 34 |
| 2000 | 1171.41 | 36 |
| 1999 | 979.77 | 38 |
| 1998 | 913.31 | 38 |
| 1997 | 858.44 | 40 |
| 1996 | 682.64 | 45 |
| 1995 | 749.07 | 40 |
| 1994 | 565.31 | 44 |
| 1993 | 581.24 | 40 |
| 1992 | 584.5 | 38 |
| 1991 | 517.49 | 37 |
| 1990 | 470.28 | 42 |
| 1989 | 421.2 | 41 |
| 1988 | 584.28 | 36 |
| 1987 | 453.44 | 37 |
| 1986 | 587.94 | 31 |