| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 64 | 110 |
| 2015 | 76 | 107 |
| 2014 | 85 | 108 |
| 2013 | 76 | 110 |
| 2012 | 73 | 112 |
| 2011 | 66 | 113 |
| 2010 | 56 | 107 |
| 2009 | 50 | 107 |
| 2008 | 43 | 122 |
| 2007 | 35 | 120 |
| 2006 | 29 | 119 |
| 2005 | 26 | 117 |
| 2004 | 24 | 114 |
| 2003 | 20 | 116 |
| 2002 | 15 | 124 |
| 2001 | 15 | 120 |
| 2000 | 16 | 115 |
| 1999 | 16 | 110 |
| 1998 | 16 | 108 |
| 1997 | 18 | 108 |
| 1996 | 17 | 105 |
| 1995 | 16 | 102 |
| 1994 | 14 | 105 |
| 1993 | 13 | 97 |
| 1992 | 13 | 96 |
| 1991 | 11 | 96 |
| 1990 | 12 | 95 |
| 1989 | 13 | 90 |
| 1988 | 13 | 84 |
| 1987 | 12 | 82 |
| 1986 | 9 | 95 |