| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 1036.5 | 59 |
| 2014 | 1025 | 61 |
| 2013 | 973.3 | 62 |
| 2012 | 897.3 | 61 |
| 2011 | 811.4 | 61 |
| 2010 | 735 | 62 |
| 2009 | 740.5 | 63 |
| 2008 | 872.1 | 60 |
| 2007 | 744.1 | 60 |
| 2006 | 595.3 | 60 |
| 2005 | 519.5 | 61 |
| 2004 | 448.6 | 59 |
| 2003 | 394.4 | 59 |
| 2002 | 350.8 | 59 |
| 2001 | 293.9 | 61 |
| 2000 | 277.8 | 60 |
| 1999 | 281.6 | 60 |
| 1998 | 278.2 | 59 |
| 1997 | 263.3 | 62 |
| 1996 | 273.7 | 57 |
| 1995 | 243.7 | 59 |
| 1994 | 227.3 | 59 |
| 1993 | 231.1 | 57 |
| 1992 | 225.9 | 57 |
| 1991 | 229.9 | 56 |
| 1990 | 208.5 | 60 |
| 1989 | 216.3 | 54 |
| 1988 | 197.4 | 53 |
| 1987 | 189.2 | 55 |
| 1986 | 182.3 | 52 |