| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 22 | 144 |
| 2015 | 30 | 137 |
| 2014 | 39 | 137 |
| 2013 | 38 | 137 |
| 2012 | 36 | 135 |
| 2011 | 37 | 136 |
| 2010 | 30 | 137 |
| 2009 | 25 | 137 |
| 2008 | 26 | 142 |
| 2007 | 22 | 140 |
| 2006 | 17 | 141 |
| 2005 | 15 | 139 |
| 2004 | 13 | 141 |
| 2003 | 12 | 136 |
| 2002 | 11 | 128 |
| 2001 | 10 | 133 |
| 2000 | 10 | 132 |
| 1999 | 8 | 134 |
| 1998 | 11 | 120 |
| 1997 | 11 | 123 |
| 1996 | 10 | 130 |
| 1995 | 9 | 126 |
| 1994 | 8 | 127 |
| 1993 | 8 | 110 |
| 1992 | 7 | 118 |
| 1991 | 8 | 104 |
| 1990 | 9 | 104 |
| 1989 | 8 | 105 |
| 1988 | 8 | 104 |
| 1987 | 7 | 106 |
| 1986 | 9 | 99 |