| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1271 | 10 |
| 2015 | 1183 | 11 |
| 2014 | 1332 | 10 |
| 2013 | 1265 | 10 |
| 2012 | 1222 | 10 |
| 2011 | 1309 | 9 |
| 2010 | 1129 | 9 |
| 2009 | 1127 | 8 |
| 2008 | 1324 | 8 |
| 2007 | 1199 | 6 |
| 2006 | 1035 | 6 |
| 2005 | 922 | 6 |
| 2004 | 842 | 8 |
| 2003 | 738 | 6 |
| 2002 | 604 | 8 |
| 2001 | 560 | 8 |
| 2000 | 528 | 8 |
| 1999 | 525 | 8 |
| 1998 | 483 | 9 |
| 1997 | 430 | 9 |
| 1996 | 437 | 8 |
| 1995 | 400 | 7 |
| 1994 | 334 | 7 |
| 1993 | 301 | 7 |
| 1992 | 331 | 7 |
| 1991 | 288 | 7 |
| 1990 | 276 | 7 |
| 1989 | 244 | 6 |
| 1988 | 242 | 6 |
| 1987 | 214 | 6 |
| 1986 | 177 | 6 |