| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 326 | 26 |
| 2015 | 330 | 31 |
| 2014 | 390 | 31 |
| 2013 | 364 | 31 |
| 2012 | 374 | 30 |
| 2011 | 353 | 30 |
| 2010 | 293 | 30 |
| 2009 | 262 | 31 |
| 2008 | 288 | 31 |
| 2007 | 226 | 32 |
| 2006 | 170 | 33 |
| 2005 | 138 | 34 |
| 2004 | 108 | 35 |
| 2003 | 87 | 36 |
| 2002 | 78 | 34 |
| 2001 | 77 | 34 |
| 2000 | 79 | 32 |
| 1999 | 60 | 34 |
| 1998 | 71 | 31 |
| 1997 | 57 | 34 |
| 1996 | 46 | 36 |
| 1995 | 60 | 32 |
| 1994 | 48 | 31 |
| 1993 | 39 | 30 |
| 1992 | 40 | 29 |
| 1991 | 33 | 29 |
| 1990 | 37 | 27 |
| 1989 | 31 | 27 |
| 1988 | 22 | 29 |
| 1987 | 19 | 29 |
| 1986 | 18 | 30 |