| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 12 | 115 |
| 2015 | 12 | 138 |
| 2014 | 18 | 135 |
| 2013 | 24 | 130 |
| 2012 | 21 | 132 |
| 2011 | 23 | 127 |
| 2010 | 17 | 133 |
| 2009 | 12 | 139 |
| 2008 | 15 | 132 |
| 2007 | 12 | 134 |
| 2006 | 13 | 129 |
| 2005 | 7 | 136 |
| 2004 | 5 | 147 |
| 2003 | 4 | 148 |
| 2002 | 3 | 142 |
| 2001 | 3 | 137 |
| 2000 | 3 | 136 |
| 1999 | 4 | 132 |
| 1998 | 4 | 130 |
| 1997 | 3 | 136 |
| 1996 | 3 | 135 |
| 1995 | 3 | 134 |
| 1994 | 3 | 117 |
| 1993 | 3 | 116 |
| 1992 | 3 | 113 |
| 1991 | 3 | 113 |
| 1990 | 3 | 114 |
| 1989 | 3 | 93 |
| 1988 | 2 | 94 |
| 1987 | 2 | 94 |
| 1986 | 2 | 90 |