| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3297 | 10 |
| 2015 | 3462 | 12 |
| 2014 | 5028 | 8 |
| 2013 | 5248 | 7 |
| 2012 | 5456 | 6 |
| 2011 | 6044 | 5 |
| 2010 | 5140 | 5 |
| 2009 | 3647 | 10 |
| 2008 | 3915 | 12 |
| 2007 | 3231 | 14 |
| 2006 | 2608 | 13 |
| 2005 | 2155 | 13 |
| 2004 | 1627 | 13 |
| 2003 | 1289 | 12 |
| 2002 | 1143 | 12 |
| 2001 | 1266 | 12 |
| 2000 | 1508 | 11 |
| 1999 | 1303 | 11 |
| 1998 | 1910 | 8 |
| 1997 | 1996 | 8 |
| 1996 | 1900 | 8 |
| 1995 | 1848 | 8 |
| 1994 | 1935 | 7 |
| 1993 | 1582 | 8 |
| 1992 | 1362 | 8 |
| 1991 | 1900 | 7 |
| 1990 | 1517 | 6 |
| 1989 | 1800 | 4 |
| 1988 | 1303 | 4 |
| 1987 | 1214 | 3 |
| 1986 | 1078 | 4 |