| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 29 | 126 |
| 2015 | 34 | 142 |
| 2014 | 35 | 143 |
| 2013 | 34 | 145 |
| 2012 | 35 | 145 |
| 2011 | 24 | 152 |
| 2010 | 17 | 159 |
| 2009 | 14 | 160 |
| 2008 | 18 | 156 |
| 2007 | 15 | 154 |
| 2006 | 12 | 153 |
| 2005 | 10 | 156 |
| 2004 | 9 | 155 |
| 2003 | 9 | 151 |
| 2002 | 9 | 148 |
| 2001 | 9 | 139 |
| 2000 | 9 | 139 |
| 1999 | 9 | 138 |
| 1998 | 10 | 135 |
| 1997 | 9 | 141 |
| 1996 | 9 | 138 |
| 1995 | 9 | 136 |
| 1994 | 9 | 127 |
| 1993 | 9 | 117 |
| 1992 | 9 | 119 |
| 1991 | 9 | 114 |
| 1990 | 9 | 114 |
| 1989 | 7 | 101 |
| 1988 | 7 | 97 |
| 1987 | 6 | 99 |
| 1986 | 5 | 103 |