| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 396 | 9 |
| 2015 | 374 | 14 |
| 2014 | 346 | 17 |
| 2013 | 325 | 19 |
| 2012 | 315 | 18 |
| 2011 | 327 | 19 |
| 2010 | 292 | 18 |
| 2009 | 246 | 17 |
| 2008 | 206 | 24 |
| 2007 | 175 | 24 |
| 2006 | 142 | 23 |
| 2005 | 125 | 24 |
| 2004 | 113 | 26 |
| 2003 | 127 | 21 |
| 2002 | 135 | 18 |
| 2001 | 150 | 16 |
| 2000 | 155 | 15 |
| 1999 | 144 | 15 |
| 1998 | 135 | 18 |
| 1997 | 124 | 22 |
| 1996 | 109 | 24 |
| 1995 | 95 | 26 |
| 1994 | 82 | 24 |
| 1993 | 73 | 25 |
| 1992 | 65 | 28 |
| 1991 | 64 | 28 |
| 1990 | 80 | 26 |
| 1989 | 74 | 19 |
| 1988 | 63 | 25 |
| 1987 | 79 | 20 |
| 1986 | 70 | 17 |