| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 72 | 104 |
| 2015 | 71 | 110 |
| 2014 | 69 | 114 |
| 2013 | 67 | 111 |
| 2012 | 68 | 114 |
| 2011 | 64 | 117 |
| 2010 | 48 | 117 |
| 2009 | 39 | 119 |
| 2008 | 47 | 118 |
| 2007 | 40 | 115 |
| 2006 | 34 | 112 |
| 2005 | 30 | 111 |
| 2004 | 22 | 117 |
| 2003 | 19 | 117 |
| 2002 | 18 | 113 |
| 2001 | 18 | 112 |
| 2000 | 18 | 110 |
| 1999 | 19 | 106 |
| 1998 | 15 | 113 |
| 1997 | 15 | 113 |
| 1996 | 12 | 120 |
| 1995 | 10 | 123 |
| 1994 | 9 | 124 |
| 1993 | 7 | 115 |
| 1992 | 9 | 111 |
| 1991 | 8 | 107 |
| 1990 | 6 | 115 |
| 1989 | 6 | 111 |
| 1988 | 8 | 103 |
| 1987 | 8 | 103 |
| 1986 | 9 | 100 |