| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 52 | 110 |
| 2015 | 52 | 126 |
| 2014 | 70 | 124 |
| 2013 | 77 | 117 |
| 2012 | 81 | 114 |
| 2011 | 77 | 114 |
| 2010 | 41 | 134 |
| 2009 | 26 | 142 |
| 2008 | 38 | 137 |
| 2007 | 25 | 140 |
| 2006 | 18 | 145 |
| 2005 | 16 | 144 |
| 2004 | 14 | 145 |
| 2003 | 11 | 145 |
| 2002 | 9 | 144 |
| 2001 | 8 | 142 |
| 2000 | 8 | 142 |
| 1999 | 7 | 146 |
| 1998 | 7 | 146 |
| 1997 | 6 | 151 |
| 1996 | 6 | 151 |
| 1995 | 6 | 147 |
| 1994 | 5 | 142 |
| 1993 | 5 | 135 |
| 1992 | 5 | 132 |
| 1991 | 20 | 92 |
| 1990 | 10 | 109 |
| 1989 | 19 | 76 |
| 1988 | 21 | 70 |
| 1987 | 22 | 69 |
| 1986 | 24 | 65 |