| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 28 | 134 |
| 2015 | 28 | 141 |
| 2014 | 32 | 145 |
| 2013 | 33 | 140 |
| 2012 | 31 | 143 |
| 2011 | 29 | 143 |
| 2010 | 26 | 140 |
| 2009 | 32 | 129 |
| 2008 | 38 | 128 |
| 2007 | 26 | 135 |
| 2006 | 18 | 140 |
| 2005 | 17 | 134 |
| 2004 | 17 | 131 |
| 2003 | 13 | 133 |
| 2002 | 6 | 150 |
| 2001 | 11 | 126 |
| 2000 | 11 | 127 |
| 1999 | 7 | 140 |
| 1998 | 7 | 143 |
| 1997 | 7 | 142 |
| 1996 | 6 | 148 |
| 1995 | 6 | 142 |
| 1994 | 5 | 140 |
| 1993 | 5 | 129 |
| 1992 | 5 | 128 |
| 1991 | 4 | 122 |
| 1990 | 7 | 114 |
| 1989 | 3 | 130 |
| 1988 | 4 | 128 |
| 1987 | 3 | 130 |
| 1986 | 4 | 123 |