| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 790 | 40 |
| 2015 | 741 | 44 |
| 2014 | 831 | 45 |
| 2013 | 776 | 50 |
| 2012 | 729 | 50 |
| 2011 | 786 | 49 |
| 2010 | 646 | 49 |
| 2009 | 566 | 46 |
| 2008 | 837 | 43 |
| 2007 | 745 | 40 |
| 2006 | 543 | 45 |
| 2005 | 429 | 46 |
| 2004 | 340 | 46 |
| 2003 | 251 | 47 |
| 2002 | 189 | 50 |
| 2001 | 165 | 53 |
| 2000 | 142 | 52 |
| 1999 | 117 | 54 |
| 1998 | 129 | 53 |
| 1997 | 125 | 54 |
| 1996 | 127 | 53 |
| 1995 | 115 | 53 |
| 1994 | 81 | 57 |
| 1993 | 74 | 58 |
| 1992 | 91 | 55 |
| 1991 | 62 | 57 |
| 1990 | 102 | 50 |