| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 37 | 121 |
| 2015 | 41 | 137 |
| 2014 | 59 | 130 |
| 2013 | 51 | 136 |
| 2012 | 52 | 135 |
| 2011 | 51 | 133 |
| 2010 | 46 | 129 |
| 2009 | 39 | 130 |
| 2008 | 39 | 136 |
| 2007 | 35 | 131 |
| 2006 | 36 | 123 |
| 2005 | 25 | 129 |
| 2004 | 22 | 130 |
| 2003 | 16 | 135 |
| 2002 | 23 | 113 |
| 2001 | 8 | 140 |
| 2000 | 5 | 155 |
| 1999 | 5 | 153 |
| 1998 | 5 | 152 |
| 1997 | 5 | 154 |
| 1996 | 5 | 154 |
| 1995 | 5 | 149 |
| 1994 | 4 | 148 |
| 1993 | 4 | 137 |
| 1992 | 5 | 133 |
| 1991 | 5 | 133 |
| 1990 | 5 | 131 |
| 1989 | 5 | 113 |
| 1988 | 4 | 109 |
| 1987 | 4 | 109 |
| 1986 | 4 | 109 |