| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3748 | 8 |
| 2015 | 4023 | 9 |
| 2014 | 5758 | 5 |
| 2013 | 6375 | 5 |
| 2012 | 6269 | 5 |
| 2011 | 5930 | 6 |
| 2010 | 4575 | 9 |
| 2009 | 3586 | 11 |
| 2008 | 5113 | 8 |
| 2007 | 4058 | 9 |
| 2006 | 3146 | 11 |
| 2005 | 2493 | 11 |
| 2004 | 1874 | 12 |
| 2003 | 1233 | 13 |
| 2002 | 1000 | 13 |
| 2001 | 976 | 13 |
| 2000 | 881 | 16 |
| 1999 | 656 | 20 |
| 1998 | 920 | 15 |
| 1997 | 1405 | 12 |
| 1996 | 1385 | 10 |
| 1995 | 1366 | 10 |
| 1994 | 1628 | 8 |
| 1993 | 1763 | 7 |
| 1992 | 1945 | 6 |
| 1991 | 2376 | 6 |
| 1990 | 2326 | 5 |
| 1989 | 2360 | 3 |