| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 2072 | 5 |
| 2015 | 2163 | 5 |
| 2014 | 2181 | 5 |
| 2013 | 2058 | 5 |
| 2012 | 2006 | 5 |
| 2011 | 2003 | 5 |
| 2010 | 1166 | 8 |
| 2009 | 1216 | 6 |
| 2008 | 1447 | 5 |
| 2007 | 1249 | 5 |
| 2006 | 935 | 9 |
| 2005 | 780 | 9 |
| 2004 | 788 | 9 |
| 2003 | 573 | 9 |
| 2002 | 1018 | 4 |
| 2001 | 897 | 4 |
| 2000 | 784 | 5 |
| 1999 | 660 | 5 |
| 1998 | 624 | 6 |
| 1997 | 575 | 7 |
| 1996 | 206 | 13 |
| 1995 | 184 | 12 |
| 1994 | 164 | 12 |
| 1993 | 110 | 17 |
| 1992 | 91 | 19 |
| 1991 | 69 | 20 |
| 1990 | 57 | 20 |
| 1989 | 45 | 20 |
| 1988 | 47 | 18 |
| 1987 | 42 | 17 |
| 1986 | 36 | 16 |