| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 346 | 29 |
| 2014 | 420 | 29 |
| 2013 | 420 | 29 |
| 2012 | 405 | 28 |
| 2011 | 388 | 29 |
| 2010 | 346 | 28 |
| 2009 | 282 | 30 |
| 2008 | 307 | 30 |
| 2007 | 290 | 29 |
| 2006 | 210 | 29 |
| 2005 | 196 | 28 |
| 2004 | 172 | 27 |
| 2003 | 135 | 26 |
| 2002 | 148 | 25 |
| 2001 | 144 | 23 |
| 2000 | 139 | 24 |
| 1999 | 120 | 25 |
| 1998 | 114 | 22 |
| 1997 | 156 | 20 |
| 1996 | 150 | 19 |
| 1995 | 114 | 20 |
| 1994 | 92 | 20 |
| 1993 | 63 | 23 |
| 1992 | 49 | 25 |
| 1991 | 43 | 25 |
| 1990 | 38 | 26 |
| 1989 | 28 | 29 |
| 1988 | 23 | 28 |
| 1987 | 22 | 28 |
| 1986 | 19 | 28 |