| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 48 | 103 |
| 2015 | 48 | 107 |
| 2014 | 51 | 110 |
| 2013 | 48 | 110 |
| 2012 | 47 | 112 |
| 2011 | 41 | 120 |
| 2010 | 33 | 118 |
| 2009 | 24 | 118 |
| 2008 | 25 | 121 |
| 2007 | 22 | 123 |
| 2006 | 19 | 123 |
| 2005 | 17 | 122 |
| 2004 | 8 | 136 |
| 2003 | 6 | 137 |
| 2002 | 6 | 131 |
| 2001 | 6 | 131 |
| 2000 | 6 | 129 |
| 1999 | 5 | 130 |
| 1998 | 6 | 126 |
| 1997 | 6 | 130 |
| 1996 | 5 | 135 |
| 1995 | 5 | 132 |
| 1994 | 3 | 140 |
| 1993 | 3 | 130 |
| 1992 | 2 | 131 |
| 1991 | 3 | 122 |
| 1990 | 3 | 116 |
| 1989 | 3 | 116 |
| 1988 | 2 | 122 |
| 1987 | 3 | 120 |
| 1986 | 2 | 121 |