| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 337 | 25 |
| 2015 | 329 | 29 |
| 2014 | 365 | 29 |
| 2013 | 344 | 30 |
| 2012 | 332 | 30 |
| 2011 | 336 | 29 |
| 2010 | 309 | 29 |
| 2009 | 240 | 30 |
| 2008 | 304 | 29 |
| 2007 | 241 | 30 |
| 2006 | 196 | 31 |
| 2005 | 155 | 32 |
| 2004 | 133 | 30 |
| 2003 | 108 | 31 |
| 2002 | 92 | 31 |
| 2001 | 89 | 29 |
| 2000 | 89 | 31 |
| 1999 | 68 | 33 |
| 1998 | 65 | 33 |
| 1997 | 56 | 34 |
| 1996 | 62 | 32 |
| 1995 | 70 | 27 |
| 1994 | 37 | 34 |
| 1993 | 36 | 33 |
| 1992 | 40 | 32 |
| 1991 | 30 | 33 |
| 1990 | 28 | 31 |
| 1989 | 31 | 28 |
| 1988 | 24 | 31 |
| 1987 | 20 | 31 |
| 1986 | 20 | 30 |