| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 479 | 46 |
| 2015 | 520 | 47 |
| 2014 | 590 | 49 |
| 2013 | 610 | 48 |
| 2012 | 562 | 50 |
| 2011 | 478 | 52 |
| 2010 | 439 | 50 |
| 2009 | 384 | 51 |
| 2008 | 330 | 60 |
| 2007 | 215 | 64 |
| 2006 | 209 | 62 |
| 2005 | 235 | 51 |
| 2004 | 213 | 49 |
| 2003 | 99 | 63 |
| 2002 | 98 | 57 |
| 2001 | 131 | 51 |
| 2000 | 134 | 49 |
| 1999 | 69 | 63 |
| 1998 | 44 | 74 |
| 1997 | 40 | 78 |
| 1996 | 10 | 131 |
| 1995 | 7 | 140 |
| 1994 | 6 | 133 |
| 1993 | 7 | 118 |
| 1992 | 9 | 108 |
| 1991 | 5 | 117 |
| 1990 | 77 | 44 |
| 1989 | 116 | 38 |
| 1988 | 103 | 39 |
| 1987 | 74 | 43 |
| 1986 | 102 | 37 |