| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 97 | 92 |
| 2015 | 67 | 111 |
| 2014 | 76 | 112 |
| 2013 | 66 | 114 |
| 2012 | 61 | 122 |
| 2011 | 58 | 122 |
| 2010 | 51 | 114 |
| 2009 | 44 | 116 |
| 2008 | 36 | 131 |
| 2007 | 31 | 125 |
| 2006 | 25 | 128 |
| 2005 | 23 | 126 |
| 2004 | 19 | 124 |
| 2003 | 18 | 120 |
| 2002 | 14 | 125 |
| 2001 | 15 | 121 |
| 2000 | 16 | 113 |
| 1999 | 14 | 116 |
| 1998 | 12 | 117 |
| 1997 | 17 | 110 |
| 1996 | 14 | 112 |
| 1995 | 13 | 112 |
| 1994 | 12 | 110 |
| 1993 | 9 | 106 |
| 1992 | 8 | 115 |
| 1991 | 7 | 108 |
| 1990 | 7 | 112 |
| 1989 | 6 | 116 |
| 1988 | 7 | 108 |
| 1987 | 6 | 111 |
| 1986 | 5 | 111 |