| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 44 | 107 |
| 2015 | 41 | 113 |
| 2014 | 46 | 115 |
| 2013 | 46 | 112 |
| 2012 | 44 | 113 |
| 2011 | 44 | 118 |
| 2010 | 40 | 113 |
| 2009 | 31 | 112 |
| 2008 | 31 | 117 |
| 2007 | 29 | 117 |
| 2006 | 26 | 116 |
| 2005 | 21 | 116 |
| 2004 | 18 | 117 |
| 2003 | 13 | 117 |
| 2002 | 11 | 116 |
| 2001 | 12 | 113 |
| 2000 | 13 | 110 |
| 1999 | 12 | 105 |
| 1998 | 12 | 105 |
| 1997 | 13 | 105 |
| 1996 | 14 | 103 |
| 1995 | 14 | 102 |
| 1994 | 13 | 98 |
| 1993 | 12 | 87 |
| 1992 | 13 | 84 |
| 1991 | 12 | 82 |
| 1990 | 11 | 87 |
| 1989 | 11 | 83 |
| 1988 | 11 | 82 |
| 1987 | 10 | 80 |
| 1986 | 10 | 80 |