| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 3674 | 23 |
| 2015 | 3609.1 | 29 |
| 2014 | 3312.9 | 33 |
| 2013 | 3068.7 | 35 |
| 2012 | 3014.9 | 35 |
| 2011 | 2457.3 | 40 |
| 2010 | 2303.5 | 38 |
| 2009 | 2015.3 | 39 |
| 2008 | 1719.3 | 48 |
| 2007 | 1364.5 | 50 |
| 2006 | 1092.2 | 50 |
| 2005 | 917.2 | 49 |
| 2004 | 799.2 | 49 |
| 2003 | 850.7 | 44 |
| 2002 | 916.8 | 38 |
| 2001 | 1023.7 | 37 |
| 2000 | 1064.4 | 36 |
| 1999 | 982 | 36 |
| 1998 | 928.9 | 37 |
| 1997 | 831.9 | 41 |
| 1996 | 713.1 | 41 |
| 1995 | 632.6 | 42 |
| 1994 | 547.4 | 41 |
| 1993 | 485.6 | 45 |
| 1992 | 429.1 | 45 |
| 1991 | 399.2 | 43 |
| 1990 | 485.9 | 39 |
| 1989 | 453.8 | 38 |
| 1988 | 413 | 39 |
| 1987 | 446.4 | 36 |
| 1986 | 394.2 | 35 |