| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 62 | 106 |
| 2015 | 82 | 112 |
| 2014 | 100 | 109 |
| 2013 | 93 | 111 |
| 2012 | 83 | 113 |
| 2011 | 83 | 110 |
| 2010 | 66 | 111 |
| 2009 | 48 | 122 |
| 2008 | 56 | 121 |
| 2007 | 45 | 121 |
| 2006 | 51 | 108 |
| 2005 | 33 | 119 |
| 2004 | 24 | 126 |
| 2003 | 27 | 115 |
| 2002 | 16 | 127 |
| 2001 | 15 | 124 |
| 2000 | 14 | 125 |
| 1999 | 14 | 124 |
| 1998 | 14 | 122 |
| 1997 | 14 | 124 |
| 1996 | 15 | 120 |
| 1995 | 13 | 119 |
| 1994 | 13 | 111 |
| 1993 | 6 | 134 |
| 1992 | 5 | 131 |
| 1991 | 8 | 124 |
| 1990 | 5 | 128 |
| 1989 | 8 | 98 |
| 1988 | 9 | 94 |
| 1987 | 9 | 94 |
| 1986 | 10 | 90 |