| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 32 | 114 |
| 2015 | 33 | 134 |
| 2014 | 37 | 135 |
| 2013 | 33 | 139 |
| 2012 | 29 | 142 |
| 2011 | 29 | 140 |
| 2010 | 25 | 140 |
| 2009 | 23 | 140 |
| 2008 | 22 | 140 |
| 2007 | 19 | 142 |
| 2006 | 16 | 140 |
| 2005 | 14 | 141 |
| 2004 | 13 | 139 |
| 2003 | 11 | 136 |
| 2002 | 9 | 136 |
| 2001 | 8 | 135 |
| 2000 | 7 | 137 |
| 1999 | 7 | 133 |
| 1998 | 8 | 130 |
| 1997 | 8 | 133 |
| 1996 | 10 | 126 |
| 1995 | 9 | 125 |
| 1994 | 8 | 110 |
| 1993 | 10 | 104 |
| 1992 | 16 | 87 |
| 1991 | 14 | 90 |
| 1990 | 13 | 90 |
| 1989 | 12 | 78 |
| 1988 | 12 | 74 |
| 1987 | 12 | 73 |
| 1986 | 10 | 72 |