| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 78 | 114 |
| 2014 | 81 | 116 |
| 2013 | 74 | 121 |
| 2012 | 78 | 116 |
| 2011 | 71 | 122 |
| 2010 | 68 | 108 |
| 2009 | 65 | 107 |
| 2008 | 57 | 117 |
| 2007 | 49 | 118 |
| 2006 | 33 | 126 |
| 2005 | 29 | 124 |
| 2004 | 28 | 120 |
| 2003 | 26 | 119 |
| 2002 | 16 | 129 |
| 2001 | 17 | 117 |
| 2000 | 17 | 118 |
| 1999 | 19 | 111 |
| 1998 | 20 | 112 |
| 1997 | 21 | 110 |
| 1996 | 20 | 108 |
| 1995 | 19 | 105 |
| 1994 | 17 | 104 |
| 1993 | 16 | 105 |
| 1992 | 17 | 102 |
| 1991 | 15 | 104 |
| 1990 | 14 | 103 |
| 1989 | 12 | 92 |
| 1988 | 11 | 91 |
| 1987 | 12 | 87 |
| 1986 | 8 | 91 |