| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 2272 | 19 |
| 2015 | 2216 | 26 |
| 2014 | 2516 | 25 |
| 2013 | 2326 | 24 |
| 2012 | 2246 | 26 |
| 2011 | 2354 | 25 |
| 2010 | 2016 | 23 |
| 2009 | 1673 | 23 |
| 2008 | 2290 | 21 |
| 2007 | 1807 | 23 |
| 2006 | 1377 | 26 |
| 2005 | 1092 | 27 |
| 2004 | 943 | 27 |
| 2003 | 784 | 26 |
| 2002 | 639 | 27 |
| 2001 | 588 | 27 |
| 2000 | 577 | 28 |
| 1999 | 507 | 28 |
| 1998 | 535 | 27 |
| 1997 | 431 | 32 |
| 1996 | 374 | 35 |
| 1995 | 294 | 37 |
| 1994 | 214 | 39 |
| 1993 | 190 | 39 |
| 1992 | 188 | 37 |
| 1991 | 196 | 37 |
| 1990 | 128 | 44 |