| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 25 | 139 |
| 2014 | 26 | 142 |
| 2013 | 24 | 147 |
| 2012 | 23 | 147 |
| 2011 | 22 | 147 |
| 2010 | 18 | 150 |
| 2009 | 17 | 147 |
| 2008 | 20 | 145 |
| 2007 | 20 | 141 |
| 2006 | 17 | 136 |
| 2005 | 17 | 135 |
| 2004 | 14 | 136 |
| 2003 | 12 | 134 |
| 2002 | 10 | 134 |
| 2001 | 9 | 132 |
| 2000 | 9 | 131 |
| 1999 | 10 | 127 |
| 1998 | 8 | 131 |
| 1997 | 10 | 129 |
| 1996 | 10 | 125 |
| 1995 | 9 | 127 |
| 1994 | 8 | 109 |
| 1993 | 8 | 107 |
| 1992 | 7 | 108 |
| 1991 | 7 | 109 |
| 1990 | 7 | 109 |
| 1989 | 6 | 93 |
| 1988 | 6 | 93 |
| 1987 | 6 | 89 |
| 1986 | 7 | 83 |