| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 65 | 108 |
| 2015 | 60 | 114 |
| 2014 | 76 | 111 |
| 2013 | 66 | 112 |
| 2012 | 65 | 118 |
| 2011 | 68 | 110 |
| 2010 | 51 | 115 |
| 2009 | 44 | 115 |
| 2008 | 57 | 110 |
| 2007 | 47 | 111 |
| 2006 | 32 | 113 |
| 2005 | 27 | 113 |
| 2004 | 24 | 113 |
| 2003 | 22 | 111 |
| 2002 | 19 | 110 |
| 2001 | 19 | 108 |
| 2000 | 15 | 119 |
| 1999 | 13 | 120 |
| 1998 | 15 | 112 |
| 1997 | 14 | 115 |
| 1996 | 12 | 118 |
| 1995 | 12 | 115 |
| 1994 | 11 | 112 |
| 1993 | 11 | 101 |
| 1992 | 12 | 98 |
| 1991 | 12 | 94 |
| 1990 | 14 | 87 |
| 1989 | 13 | 89 |
| 1988 | 13 | 83 |
| 1987 | 17 | 72 |
| 1986 | 17 | 70 |