| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 58 | 95 |
| 2015 | 70 | 96 |
| 2014 | 97 | 92 |
| 2013 | 106 | 89 |
| 2012 | 94 | 92 |
| 2011 | 90 | 95 |
| 2010 | 72 | 94 |
| 2009 | 43 | 103 |
| 2008 | 51 | 105 |
| 2007 | 46 | 102 |
| 2006 | 38 | 102 |
| 2005 | 18 | 119 |
| 2004 | 16 | 120 |
| 2003 | 10 | 123 |
| 2002 | 10 | 122 |
| 2001 | 10 | 119 |
| 2000 | 9 | 118 |
| 1999 | 11 | 110 |
| 1998 | 10 | 110 |
| 1997 | 9 | 113 |
| 1996 | 10 | 110 |
| 1995 | 10 | 109 |
| 1994 | 9 | 110 |
| 1993 | 8 | 99 |
| 1992 | 8 | 99 |
| 1991 | 11 | 89 |
| 1990 | 13 | 81 |
| 1989 | 13 | 81 |
| 1988 | 12 | 80 |
| 1987 | 9 | 87 |
| 1986 | 5 | 98 |