| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4256 | 6 |
| 2015 | 4218 | 8 |
| 2014 | 4979 | 9 |
| 2013 | 4999 | 8 |
| 2012 | 4740 | 10 |
| 2011 | 5099 | 8 |
| 2010 | 4676 | 7 |
| 2009 | 4881 | 5 |
| 2008 | 5440 | 7 |
| 2007 | 5036 | 7 |
| 2006 | 4425 | 7 |
| 2005 | 4258 | 7 |
| 2004 | 4175 | 7 |
| 2003 | 3676 | 7 |
| 2002 | 3050 | 6 |
| 2001 | 2851 | 6 |
| 2000 | 2867 | 6 |
| 1999 | 3130 | 6 |
| 1998 | 3187 | 7 |
| 1997 | 3094 | 7 |
| 1996 | 3444 | 5 |
| 1995 | 3536 | 3 |
| 1994 | 3070 | 3 |
| 1993 | 3023 | 3 |
| 1992 | 3333 | 4 |
| 1991 | 3056 | 5 |
| 1990 | 3076 | 3 |
| 1989 | 2478 | 2 |
| 1988 | 2522 | 2 |
| 1987 | 2319 | 2 |
| 1986 | 1945 | 2 |