| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 13396 | 2 |
| 2015 | 13268 | 3 |
| 2014 | 14946 | 3 |
| 2013 | 14451 | 3 |
| 2012 | 14011 | 3 |
| 2011 | 14740 | 3 |
| 2010 | 12589 | 3 |
| 2009 | 11200 | 2 |
| 2008 | 14462 | 1 |
| 2007 | 13212 | 1 |
| 2006 | 11081 | 1 |
| 2005 | 9709 | 1 |
| 2004 | 9099 | 1 |
| 2003 | 7516 | 1 |
| 2002 | 6158 | 2 |
| 2001 | 5716 | 2 |
| 2000 | 5518 | 2 |
| 1999 | 5435 | 2 |
| 1998 | 5438 | 2 |
| 1997 | 5129 | 2 |
| 1996 | 5246 | 2 |
| 1995 | 5235 | 2 |
| 1994 | 4269 | 2 |
| 1993 | 3801 | 2 |
| 1992 | 4300 | 2 |
| 1991 | 4028 | 2 |
| 1990 | 4211 | 1 |
| 1989 | 3412 | 2 |
| 1988 | 3233 | 1 |
| 1987 | 2944 | 1 |
| 1986 | 2433 | 1 |