| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 57825 | 1 |
| 2015 | 55584 | 2 |
| 2014 | 50145 | 2 |
| 2013 | 44863 | 2 |
| 2012 | 38785 | 3 |
| 2011 | 33444 | 3 |
| 2010 | 26888 | 3 |
| 2009 | 22652 | 3 |
| 2008 | 19688 | 6 |
| 2007 | 15223 | 6 |
| 2006 | 11508 | 7 |
| 2005 | 9449 | 7 |
| 2004 | 8053 | 7 |
| 2003 | 6978 | 7 |
| 2002 | 6213 | 7 |
| 2001 | 5521 | 7 |
| 2000 | 4820 | 7 |
| 1999 | 4220 | 7 |
| 1998 | 3812 | 8 |
| 1997 | 3366 | 9 |
| 1996 | 2900 | 9 |
| 1995 | 2472 | 10 |
| 1994 | 1939 | 11 |
| 1993 | 1535 | 13 |
| 1992 | 1518 | 14 |
| 1991 | 1322 | 14 |
| 1990 | 1169 | 13 |
| 1989 | 1144 | 8 |
| 1988 | 976 | 9 |
| 1987 | 829 | 7 |
| 1986 | 898 | 6 |