| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4062 | 9 |
| 2015 | 4365 | 9 |
| 2014 | 5255 | 9 |
| 2013 | 5156 | 9 |
| 2012 | 5196 | 9 |
| 2011 | 5244 | 9 |
| 2010 | 4252 | 10 |
| 2009 | 3231 | 12 |
| 2008 | 4353 | 10 |
| 2007 | 3568 | 13 |
| 2006 | 3094 | 13 |
| 2005 | 2612 | 13 |
| 2004 | 2245 | 13 |
| 2003 | 1788 | 13 |
| 2002 | 1521 | 14 |
| 2001 | 1411 | 14 |
| 2000 | 1605 | 13 |
| 1999 | 1198 | 14 |
| 1998 | 933 | 15 |
| 1997 | 1446 | 11 |
| 1996 | 1503 | 11 |
| 1995 | 1351 | 11 |
| 1994 | 1023 | 13 |
| 1993 | 838 | 13 |
| 1992 | 818 | 12 |
| 1991 | 815 | 12 |
| 1990 | 698 | 12 |
| 1989 | 615 | 12 |
| 1988 | 518 | 14 |
| 1987 | 410 | 14 |
| 1986 | 316 | 15 |