| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 92 | 95 |
| 2015 | 77 | 106 |
| 2014 | 77 | 110 |
| 2013 | 86 | 107 |
| 2012 | 91 | 102 |
| 2011 | 65 | 114 |
| 2010 | 52 | 113 |
| 2009 | 33 | 125 |
| 2008 | 30 | 139 |
| 2007 | 30 | 128 |
| 2006 | 27 | 122 |
| 2005 | 25 | 120 |
| 2004 | 22 | 120 |
| 2003 | 21 | 113 |
| 2002 | 25 | 97 |
| 2001 | 17 | 117 |
| 2000 | 12 | 121 |
| 1999 | 10 | 129 |
| 1998 | 5 | 157 |
| 1997 | 6 | 152 |
| 1996 | 7 | 144 |
| 1995 | 4 | 158 |
| 1994 | 4 | 150 |
| 1993 | 5 | 134 |
| 1992 | 4 | 137 |
| 1991 | 4 | 123 |
| 1990 | 9 | 101 |
| 1989 | 8 | 102 |
| 1988 | 9 | 97 |
| 1987 | 10 | 94 |
| 1986 | 14 | 73 |