| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 3434 | 18 |
| 2014 | 3729 | 18 |
| 2013 | 4122 | 16 |
| 2012 | 3784 | 18 |
| 2011 | 3990 | 17 |
| 2010 | 3111 | 18 |
| 2009 | 2691 | 16 |
| 2008 | 2889 | 18 |
| 2007 | 2400 | 18 |
| 2006 | 2070 | 18 |
| 2005 | 1902 | 16 |
| 2004 | 1676 | 16 |
| 2003 | 1462 | 16 |
| 2002 | 1273 | 16 |
| 2001 | 1262 | 16 |
| 2000 | 1251 | 16 |
| 1999 | 1237 | 16 |
| 1998 | 1244 | 15 |
| 1997 | 1207 | 15 |
| 1996 | 1253 | 15 |
| 1995 | 1248 | 14 |
| 1994 | 1065 | 14 |
| 1993 | 958 | 13 |
| 1992 | 1022 | 13 |
| 1991 | 1016 | 11 |
| 1990 | 1057 | 11 |
| 1989 | 879 | 11 |
| 1988 | 856 | 10 |
| 1987 | 768 | 10 |
| 1986 | 623 | 10 |