| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2013 | 5 | 139 |
| 2012 | 5 | 139 |
| 2011 | 5 | 135 |
| 2010 | 5 | 130 |
| 2009 | 5 | 127 |
| 2008 | 5 | 124 |
| 2007 | 5 | 122 |
| 2006 | 5 | 118 |
| 2005 | 5 | 111 |
| 2004 | 5 | 105 |
| 2003 | 4 | 104 |
| 2002 | 4 | 99 |
| 2001 | 4 | 94 |
| 2000 | 4 | 95 |
| 1999 | 4 | 90 |
| 1998 | 4 | 89 |
| 1997 | 4 | 86 |
| 1996 | 4 | 87 |
| 1995 | 3 | 84 |
| 1994 | 4 | 79 |
| 1993 | 4 | 74 |
| 1992 | 3 | 75 |
| 1991 | 3 | 72 |
| 1990 | 3 | 72 |
| 1989 | 3 | 74 |
| 1988 | 2 | 69 |
| 1987 | 2 | 69 |
| 1986 | 2 | 74 |