| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 51 | 99 |
| 2015 | 49 | 106 |
| 2014 | 46 | 114 |
| 2013 | 46 | 113 |
| 2012 | 51 | 109 |
| 2011 | 47 | 115 |
| 2010 | 41 | 112 |
| 2009 | 30 | 114 |
| 2008 | 31 | 118 |
| 2007 | 21 | 124 |
| 2006 | 19 | 124 |
| 2005 | 17 | 121 |
| 2004 | 15 | 123 |
| 2003 | 12 | 119 |
| 2002 | 10 | 121 |
| 2001 | 9 | 124 |
| 2000 | 7 | 125 |
| 1999 | 5 | 131 |
| 1998 | 6 | 125 |
| 1997 | 8 | 118 |
| 1996 | 8 | 116 |
| 1995 | 7 | 121 |
| 1994 | 5 | 119 |
| 1993 | 5 | 114 |
| 1992 | 4 | 114 |
| 1991 | 3 | 113 |
| 1990 | 3 | 115 |
| 1989 | 4 | 112 |
| 1988 | 3 | 118 |
| 1987 | 3 | 117 |
| 1986 | 4 | 106 |