| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 6449 | 3 |
| 2015 | 6248 | 4 |
| 2014 | 6902 | 4 |
| 2013 | 7151 | 4 |
| 2012 | 7986 | 4 |
| 2011 | 8232 | 4 |
| 2010 | 7698 | 4 |
| 2009 | 5807 | 4 |
| 2008 | 7814 | 4 |
| 2007 | 7143 | 4 |
| 2006 | 6467 | 4 |
| 2005 | 5949 | 4 |
| 2004 | 5657 | 4 |
| 2003 | 4718 | 3 |
| 2002 | 4167 | 3 |
| 2001 | 4035 | 3 |
| 2000 | 4792 | 3 |
| 1999 | 4176 | 3 |
| 1998 | 3879 | 3 |
| 1997 | 4210 | 3 |
| 1996 | 4109 | 3 |
| 1995 | 4431 | 3 |
| 1994 | 3970 | 3 |
| 1993 | 3622 | 3 |
| 1992 | 3399 | 3 |
| 1991 | 3148 | 3 |
| 1990 | 2876 | 3 |
| 1989 | 2739 | 3 |
| 1988 | 2649 | 3 |
| 1987 | 2313 | 3 |
| 1986 | 2108 | 3 |