| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 2944.1 | 32 |
| 2015 | 3208.6 | 32 |
| 2014 | 3569.6 | 32 |
| 2013 | 3753.9 | 32 |
| 2012 | 4020.8 | 27 |
| 2011 | 4130.5 | 28 |
| 2010 | 3706.9 | 28 |
| 2009 | 2947.4 | 31 |
| 2008 | 2914.2 | 30 |
| 2007 | 3034.1 | 29 |
| 2006 | 2763.4 | 26 |
| 2005 | 2584.3 | 26 |
| 2004 | 2289.2 | 27 |
| 2003 | 1711.1 | 28 |
| 2002 | 1111 | 34 |
| 2001 | 1167.2 | 35 |
| 2000 | 1324.3 | 30 |
| 1999 | 1331.8 | 30 |
| 1998 | 1362.4 | 29 |
| 1997 | 1508.6 | 28 |
| 1996 | 1454 | 30 |
| 1995 | 1544.3 | 26 |
| 1994 | 1367.1 | 25 |
| 1993 | 1282.3 | 27 |
| 1992 | 1292.7 | 25 |
| 1991 | 1188.1 | 26 |
| 1990 | 1094.2 | 28 |
| 1989 | 1222.7 | 22 |
| 1988 | 1108.9 | 23 |
| 1987 | 971 | 23 |
| 1986 | 751.1 | 27 |