| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 26 | 151 |
| 2014 | 28 | 148 |
| 2013 | 29 | 150 |
| 2012 | 25 | 154 |
| 2011 | 25 | 151 |
| 2010 | 20 | 152 |
| 2009 | 17 | 154 |
| 2008 | 26 | 144 |
| 2007 | 21 | 146 |
| 2006 | 21 | 142 |
| 2005 | 20 | 138 |
| 2004 | 19 | 136 |
| 2003 | 16 | 137 |
| 2002 | 12 | 139 |
| 2001 | 11 | 134 |
| 2000 | 12 | 132 |
| 1999 | 12 | 129 |
| 1998 | 10 | 136 |
| 1997 | 12 | 131 |
| 1996 | 13 | 128 |
| 1995 | 12 | 125 |
| 1994 | 11 | 118 |
| 1993 | 10 | 115 |
| 1992 | 8 | 120 |
| 1991 | 8 | 120 |
| 1990 | 9 | 113 |
| 1989 | 7 | 102 |
| 1988 | 6 | 103 |
| 1987 | 5 | 106 |
| 1986 | 5 | 104 |