| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 20 | 159 |
| 2014 | 24 | 155 |
| 2013 | 24 | 156 |
| 2012 | 26 | 152 |
| 2011 | 28 | 148 |
| 2010 | 26 | 146 |
| 2009 | 24 | 144 |
| 2008 | 23 | 148 |
| 2007 | 24 | 143 |
| 2006 | 23 | 136 |
| 2005 | 23 | 132 |
| 2004 | 21 | 133 |
| 2003 | 19 | 127 |
| 2002 | 12 | 137 |
| 2001 | 13 | 129 |
| 2000 | 14 | 124 |
| 1999 | 13 | 126 |
| 1998 | 13 | 127 |
| 1997 | 13 | 127 |
| 1996 | 13 | 125 |
| 1995 | 13 | 123 |
| 1994 | 10 | 121 |
| 1993 | 10 | 113 |
| 1992 | 10 | 113 |
| 1991 | 8 | 122 |
| 1990 | 8 | 122 |
| 1989 | 6 | 107 |
| 1988 | 6 | 105 |
| 1987 | 5 | 108 |
| 1986 | 4 | 111 |