| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 614 | 21 |
| 2014 | 552 | 23 |
| 2013 | 584 | 23 |
| 2012 | 494 | 24 |
| 2011 | 413 | 24 |
| 2010 | 341 | 29 |
| 2009 | 299 | 28 |
| 2008 | 328 | 28 |
| 2007 | 299 | 27 |
| 2006 | 244 | 27 |
| 2005 | 198 | 27 |
| 2004 | 189 | 26 |
| 2003 | 157 | 25 |
| 2002 | 153 | 23 |
| 2001 | 129 | 24 |
| 2000 | 138 | 25 |
| 1999 | 145 | 22 |
| 1998 | 131 | 20 |
| 1997 | 156 | 19 |
| 1996 | 167 | 15 |
| 1995 | 147 | 16 |
| 1994 | 114 | 18 |
| 1993 | 109 | 18 |
| 1992 | 92 | 18 |
| 1991 | 71 | 19 |
| 1990 | 63 | 19 |
| 1989 | 53 | 18 |
| 1988 | 45 | 19 |
| 1987 | 29 | 24 |
| 1986 | 22 | 25 |