| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2014 | 1314 | 43 |
| 2013 | 1225 | 46 |
| 2012 | 1145 | 46 |
| 2011 | 1084 | 46 |
| 2010 | 943 | 46 |
| 2009 | 795 | 47 |
| 2008 | 858 | 48 |
| 2007 | 871 | 43 |
| 2006 | 718 | 42 |
| 2005 | 738 | 38 |
| 2004 | 664 | 37 |
| 2003 | 564 | 37 |
| 2002 | 421 | 41 |
| 2001 | 335 | 45 |
| 2000 | 325 | 45 |
| 1999 | 368 | 41 |
| 1998 | 356 | 40 |
| 1997 | 408 | 39 |
| 1996 | 428 | 35 |
| 1995 | 386 | 35 |
| 1994 | 330 | 30 |
| 1993 | 279 | 29 |
| 1992 | 251 | 28 |
| 1991 | 257 | 28 |
| 1990 | 275 | 27 |
| 1989 | 257 | 23 |
| 1988 | 270 | 23 |
| 1987 | 235 | 23 |
| 1986 | 180 | 23 |