| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 108 | 85 |
| 2015 | 122 | 94 |
| 2014 | 138 | 97 |
| 2013 | 114 | 105 |
| 2012 | 102 | 106 |
| 2011 | 92 | 107 |
| 2010 | 67 | 109 |
| 2009 | 57 | 111 |
| 2008 | 63 | 116 |
| 2007 | 45 | 120 |
| 2006 | 38 | 118 |
| 2005 | 31 | 122 |
| 2004 | 23 | 129 |
| 2003 | 21 | 125 |
| 2002 | 22 | 117 |
| 2001 | 21 | 114 |
| 2000 | 23 | 106 |
| 1999 | 23 | 105 |
| 1998 | 28 | 103 |
| 1997 | 23 | 108 |
| 1996 | 20 | 109 |
| 1995 | 18 | 109 |
| 1994 | 16 | 106 |
| 1993 | 16 | 103 |
| 1992 | 16 | 103 |
| 1991 | 14 | 107 |
| 1990 | 12 | 107 |
| 1989 | 11 | 93 |
| 1988 | 11 | 92 |
| 1987 | 10 | 91 |
| 1986 | 10 | 89 |