| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1727.8 | 47 |
| 2015 | 1865.7 | 50 |
| 2014 | 2170.6 | 46 |
| 2013 | 2038.9 | 48 |
| 2012 | 1915.4 | 48 |
| 2011 | 1798.1 | 49 |
| 2010 | 1498.9 | 49 |
| 2009 | 1380.1 | 49 |
| 2008 | 1380.6 | 51 |
| 2007 | 1050.1 | 52 |
| 2006 | 855.6 | 52 |
| 2005 | 793.3 | 52 |
| 2004 | 730.3 | 51 |
| 2003 | 581.1 | 54 |
| 2002 | 511.6 | 53 |
| 2001 | 467.1 | 52 |
| 2000 | 431.3 | 51 |
| 1999 | 460.3 | 51 |
| 1998 | 481.6 | 51 |
| 1997 | 435.7 | 52 |
| 1996 | 442.1 | 52 |
| 1995 | 429.3 | 50 |
| 1994 | 440.4 | 50 |
| 1993 | 506.2 | 43 |
| 1992 | 473.1 | 42 |
| 1991 | 431.9 | 41 |
| 1990 | 629.7 | 36 |
| 1989 | 611.2 | 35 |
| 1988 | 632.8 | 31 |
| 1987 | 695.1 | 30 |
| 1986 | 702.7 | 29 |