| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 4 | 116 |
| 2015 | 4 | 135 |
| 2014 | 4 | 136 |
| 2013 | 5 | 137 |
| 2012 | 5 | 137 |
| 2011 | 6 | 135 |
| 2010 | 5 | 133 |
| 2009 | 5 | 131 |
| 2008 | 6 | 130 |
| 2007 | 5 | 130 |
| 2006 | 5 | 131 |
| 2005 | 5 | 124 |
| 2004 | 5 | 124 |
| 2003 | 5 | 123 |
| 2002 | 4 | 122 |
| 2001 | 4 | 122 |
| 2000 | 4 | 126 |
| 1999 | 4 | 119 |
| 1998 | 4 | 119 |
| 1997 | 4 | 127 |
| 1996 | 5 | 120 |
| 1995 | 5 | 115 |
| 1994 | 4 | 103 |
| 1993 | 4 | 103 |
| 1992 | 4 | 98 |
| 1991 | 4 | 101 |
| 1990 | 4 | 97 |
| 1989 | 3 | 86 |
| 1988 | 3 | 87 |
| 1987 | 3 | 85 |
| 1986 | 2 | 83 |