| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 1787.1 | 46 |
| 2015 | 1738.1 | 54 |
| 2014 | 1945.9 | 51 |
| 2013 | 1973.3 | 51 |
| 2012 | 1974.2 | 47 |
| 2011 | 2192.2 | 45 |
| 2010 | 2006 | 44 |
| 2009 | 1977.4 | 40 |
| 2008 | 2301 | 39 |
| 2007 | 1841.9 | 40 |
| 2006 | 1509.5 | 40 |
| 2005 | 1327.9 | 39 |
| 2004 | 1180.1 | 39 |
| 2003 | 1005 | 38 |
| 2002 | 827.4 | 42 |
| 2001 | 682.2 | 46 |
| 2000 | 626.1 | 45 |
| 1999 | 649.9 | 43 |
| 1998 | 665.5 | 43 |
| 1997 | 641.9 | 46 |
| 1996 | 700.3 | 42 |
| 1995 | 613.9 | 46 |
| 1994 | 479.1 | 47 |
| 1993 | 400 | 49 |
| 1992 | 340.4 | 50 |
| 1991 | 279 | 54 |
| 1990 | 393.7 | 46 |