| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 10 | 144 |
| 2015 | 11 | 146 |
| 2014 | 13 | 147 |
| 2013 | 12 | 148 |
| 2012 | 12 | 150 |
| 2011 | 14 | 143 |
| 2010 | 11 | 145 |
| 2009 | 12 | 137 |
| 2008 | 9 | 151 |
| 2007 | 9 | 146 |
| 2006 | 7 | 150 |
| 2005 | 5 | 152 |
| 2004 | 5 | 151 |
| 2003 | 5 | 144 |
| 2002 | 4 | 146 |
| 2001 | 4 | 140 |
| 2000 | 4 | 143 |
| 1999 | 5 | 142 |
| 1998 | 4 | 139 |
| 1997 | 5 | 136 |
| 1996 | 5 | 134 |
| 1995 | 4 | 139 |
| 1994 | 3 | 137 |
| 1993 | 3 | 126 |
| 1992 | 4 | 116 |
| 1991 | 5 | 103 |
| 1990 | 4 | 111 |
| 1989 | 3 | 119 |
| 1988 | 3 | 117 |
| 1987 | 3 | 119 |
| 1986 | 2 | 120 |