| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 7263 | 11 |
| 2015 | 7687 | 12 |
| 2014 | 11466 | 9 |
| 2013 | 12280 | 9 |
| 2012 | 11773 | 10 |
| 2011 | 10903 | 10 |
| 2010 | 8100 | 11 |
| 2009 | 6574 | 11 |
| 2008 | 8420 | 11 |
| 2007 | 6586 | 11 |
| 2006 | 4922 | 12 |
| 2005 | 3729 | 14 |
| 2004 | 2994 | 15 |
| 2003 | 2316 | 16 |
| 2002 | 1860 | 16 |
| 2001 | 1578 | 17 |
| 2000 | 1291 | 21 |
| 1999 | 977 | 22 |
| 1998 | 1404 | 19 |
| 1997 | 2049 | 14 |
| 1996 | 1936 | 14 |
| 1995 | 2066 | 14 |
| 1994 | 1771 | 13 |
| 1993 | 1864 | 11 |
| 1992 | 2243 | 7 |
| 1991 | 1901 | 9 |
| 1990 | 1685 | 8 |
| 1989 | 1550 | 5 |
| 1988 | 1882 | 3 |