| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 99 | 88 |
| 2015 | 98 | 103 |
| 2014 | 91 | 106 |
| 2013 | 85 | 109 |
| 2012 | 82 | 110 |
| 2011 | 80 | 110 |
| 2010 | 70 | 110 |
| 2009 | 59 | 109 |
| 2008 | 58 | 112 |
| 2007 | 47 | 117 |
| 2006 | 41 | 116 |
| 2005 | 35 | 116 |
| 2004 | 31 | 114 |
| 2003 | 26 | 114 |
| 2002 | 25 | 110 |
| 2001 | 25 | 105 |
| 2000 | 19 | 117 |
| 1999 | 17 | 116 |
| 1998 | 17 | 116 |
| 1997 | 16 | 119 |
| 1996 | 15 | 116 |
| 1995 | 15 | 114 |
| 1994 | 13 | 99 |
| 1993 | 13 | 96 |
| 1992 | 11 | 97 |
| 1991 | 13 | 94 |
| 1990 | 11 | 98 |
| 1989 | 11 | 80 |
| 1988 | 11 | 79 |
| 1987 | 9 | 79 |
| 1986 | 9 | 76 |