| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 31 | 97 |
| 2015 | 28 | 118 |
| 2014 | 32 | 114 |
| 2013 | 31 | 117 |
| 2012 | 30 | 116 |
| 2011 | 31 | 116 |
| 2010 | 26 | 116 |
| 2009 | 26 | 112 |
| 2008 | 27 | 116 |
| 2007 | 23 | 116 |
| 2006 | 19 | 116 |
| 2005 | 18 | 113 |
| 2004 | 17 | 109 |
| 2003 | 15 | 108 |
| 2002 | 12 | 107 |
| 2001 | 11 | 110 |
| 2000 | 10 | 116 |
| 1999 | 11 | 108 |
| 1998 | 11 | 108 |
| 1997 | 10 | 112 |
| 1996 | 11 | 105 |
| 1995 | 10 | 102 |
| 1994 | 8 | 95 |
| 1993 | 12 | 84 |
| 1992 | 13 | 79 |
| 1991 | 11 | 83 |
| 1990 | 11 | 80 |
| 1989 | 9 | 75 |
| 1988 | 10 | 73 |
| 1987 | 9 | 73 |
| 1986 | 7 | 73 |