| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 398 | 28 |
| 2014 | 451 | 27 |
| 2013 | 450 | 28 |
| 2012 | 431 | 28 |
| 2011 | 381 | 28 |
| 2010 | 324 | 28 |
| 2009 | 273 | 29 |
| 2008 | 301 | 30 |
| 2007 | 285 | 28 |
| 2006 | 234 | 28 |
| 2005 | 218 | 28 |
| 2004 | 190 | 26 |
| 2003 | 173 | 24 |
| 2002 | 162 | 25 |
| 2001 | 165 | 20 |
| 2000 | 166 | 19 |
| 1999 | 146 | 20 |
| 1998 | 130 | 22 |
| 1997 | 181 | 16 |
| 1996 | 174 | 17 |
| 1995 | 148 | 17 |
| 1994 | 119 | 20 |
| 1993 | 94 | 21 |
| 1992 | 72 | 22 |
| 1991 | 65 | 20 |
| 1990 | 54 | 23 |
| 1989 | 46 | 22 |
| 1988 | 40 | 21 |
| 1987 | 34 | 21 |
| 1986 | 34 | 20 |