| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 718 | 33 |
| 2015 | 1239 | 23 |
| 2014 | 1805 | 18 |
| 2013 | 1855 | 21 |
| 2012 | 1855 | 21 |
| 2011 | 1740 | 23 |
| 2010 | 1246 | 26 |
| 2009 | 1320 | 24 |
| 2008 | 1830 | 21 |
| 2007 | 1414 | 22 |
| 2006 | 1286 | 20 |
| 2005 | 1005 | 23 |
| 2004 | 764 | 25 |
| 2003 | 611 | 26 |
| 2002 | 522 | 27 |
| 2001 | 513 | 27 |
| 2000 | 506 | 26 |
| 1999 | 355 | 34 |
| 1998 | 303 | 35 |
| 1997 | 358 | 34 |
| 1996 | 341 | 32 |
| 1995 | 299 | 32 |
| 1994 | 274 | 29 |
| 1993 | 286 | 27 |
| 1992 | 300 | 27 |
| 1991 | 241 | 29 |
| 1990 | 299 | 28 |
| 1989 | 228 | 27 |
| 1988 | 192 | 26 |
| 1987 | 199 | 25 |
| 1986 | 177 | 23 |