| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 36 | 122 |
| 2015 | 43 | 134 |
| 2014 | 46 | 137 |
| 2013 | 46 | 140 |
| 2012 | 44 | 140 |
| 2011 | 42 | 140 |
| 2010 | 38 | 138 |
| 2009 | 44 | 125 |
| 2008 | 54 | 123 |
| 2007 | 38 | 127 |
| 2006 | 25 | 134 |
| 2005 | 23 | 133 |
| 2004 | 21 | 135 |
| 2003 | 18 | 132 |
| 2002 | 10 | 142 |
| 2001 | 15 | 126 |
| 2000 | 15 | 122 |
| 1999 | 12 | 128 |
| 1998 | 11 | 131 |
| 1997 | 11 | 132 |
| 1996 | 10 | 132 |
| 1995 | 10 | 131 |
| 1994 | 9 | 126 |
| 1993 | 8 | 122 |
| 1992 | 7 | 123 |
| 1991 | 7 | 128 |
| 1990 | 9 | 117 |
| 1989 | 6 | 109 |
| 1988 | 6 | 104 |
| 1987 | 6 | 103 |
| 1986 | 5 | 105 |