| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 14 | 94 |
| 2015 | 14 | 107 |
| 2014 | 15 | 110 |
| 2013 | 14 | 112 |
| 2012 | 13 | 112 |
| 2011 | 12 | 111 |
| 2010 | 11 | 111 |
| 2009 | 11 | 109 |
| 2008 | 12 | 112 |
| 2007 | 11 | 112 |
| 2006 | 10 | 108 |
| 2005 | 10 | 105 |
| 2004 | 10 | 102 |
| 2003 | 9 | 99 |
| 2002 | 9 | 98 |
| 2001 | 8 | 96 |
| 2000 | 8 | 98 |
| 1999 | 7 | 99 |
| 1998 | 7 | 103 |
| 1997 | 7 | 107 |
| 1996 | 6 | 105 |
| 1995 | 6 | 103 |
| 1994 | 6 | 91 |
| 1993 | 6 | 93 |
| 1992 | 6 | 92 |
| 1991 | 5 | 93 |
| 1990 | 5 | 94 |
| 1989 | 5 | 79 |
| 1988 | 5 | 79 |
| 1987 | 5 | 76 |
| 1986 | 5 | 71 |