| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 490 | 22 |
| 2015 | 451 | 26 |
| 2014 | 487 | 27 |
| 2013 | 446 | 28 |
| 2012 | 410 | 27 |
| 2011 | 409 | 25 |
| 2010 | 354 | 27 |
| 2009 | 313 | 27 |
| 2008 | 381 | 26 |
| 2007 | 317 | 26 |
| 2006 | 225 | 28 |
| 2005 | 181 | 29 |
| 2004 | 151 | 28 |
| 2003 | 112 | 31 |
| 2002 | 100 | 31 |
| 2001 | 98 | 29 |
| 2000 | 104 | 28 |
| 1999 | 84 | 31 |
| 1998 | 108 | 25 |
| 1997 | 89 | 28 |
| 1996 | 98 | 24 |
| 1995 | 106 | 21 |
| 1994 | 67 | 26 |
| 1993 | 42 | 29 |
| 1992 | 48 | 26 |
| 1991 | 37 | 27 |
| 1990 | 32 | 29 |
| 1989 | 32 | 26 |
| 1988 | 25 | 25 |
| 1987 | 22 | 27 |
| 1986 | 20 | 27 |