| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 204 | 63 |
| 2014 | 264 | 62 |
| 2013 | 249 | 65 |
| 2012 | 234 | 65 |
| 2011 | 193 | 65 |
| 2010 | 134 | 71 |
| 2009 | 123 | 71 |
| 2008 | 117 | 78 |
| 2007 | 48 | 96 |
| 2006 | 37 | 100 |
| 2005 | 30 | 99 |
| 2004 | 26 | 100 |
| 2003 | 23 | 97 |
| 2002 | 18 | 103 |
| 2001 | 15 | 103 |
| 2000 | 12 | 107 |
| 1999 | 11 | 107 |
| 1998 | 11 | 109 |
| 1997 | 11 | 106 |
| 1996 | 16 | 95 |
| 1995 | 15 | 94 |
| 1994 | 11 | 83 |
| 1993 | 19 | 74 |
| 1992 | 4 | 108 |
| 1991 | 10 | 86 |
| 1990 | 10 | 90 |
| 1989 | 11 | 71 |
| 1988 | 11 | 69 |
| 1987 | 9 | 72 |