| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 2250 | 17 |
| 2015 | 2300 | 18 |
| 2014 | 2500 | 19 |
| 2013 | 2390 | 23 |
| 2012 | 2260 | 23 |
| 2011 | 2030 | 24 |
| 2010 | 1650 | 24 |
| 2009 | 1500 | 20 |
| 2008 | 1770 | 25 |
| 2007 | 1325 | 26 |
| 2006 | 1001 | 26 |
| 2005 | 847 | 26 |
| 2004 | 721 | 26 |
| 2003 | 521 | 28 |
| 2002 | 427 | 29 |
| 2001 | 373 | 31 |
| 2000 | 350 | 33 |
| 1999 | 317 | 35 |
| 1998 | 326 | 33 |
| 1997 | 341 | 33 |
| 1996 | 306 | 35 |
| 1995 | 238 | 39 |
| 1994 | 228 | 35 |
| 1993 | 210 | 34 |
| 1992 | 174 | 37 |
| 1991 | 137 | 37 |
| 1990 | 112 | 39 |
| 1989 | 100 | 41 |
| 1988 | 85 | 43 |
| 1987 | 72 | 45 |
| 1986 | 64 | 45 |