| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 10 | 127 |
| 2015 | 10 | 154 |
| 2014 | 11 | 153 |
| 2013 | 11 | 157 |
| 2012 | 11 | 158 |
| 2011 | 11 | 158 |
| 2010 | 10 | 159 |
| 2009 | 10 | 157 |
| 2008 | 11 | 156 |
| 2007 | 9 | 158 |
| 2006 | 8 | 157 |
| 2005 | 7 | 157 |
| 2004 | 7 | 157 |
| 2003 | 6 | 153 |
| 2002 | 4 | 157 |
| 2001 | 4 | 160 |
| 2000 | 4 | 159 |
| 1999 | 4 | 154 |
| 1998 | 3 | 155 |
| 1997 | 3 | 156 |
| 1996 | 3 | 154 |
| 1995 | 3 | 155 |
| 1994 | 2 | 138 |
| 1993 | 3 | 126 |
| 1992 | 2 | 129 |
| 1991 | 2 | 130 |
| 1990 | 2 | 129 |
| 1989 | 2 | 111 |
| 1988 | 2 | 107 |
| 1987 | 1 | 106 |
| 1986 | 1 | 104 |