| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 57 | 96 |
| 2015 | 59 | 100 |
| 2014 | 61 | 104 |
| 2013 | 59 | 104 |
| 2012 | 61 | 103 |
| 2011 | 58 | 108 |
| 2010 | 52 | 104 |
| 2009 | 45 | 101 |
| 2008 | 50 | 107 |
| 2007 | 41 | 109 |
| 2006 | 35 | 107 |
| 2005 | 34 | 99 |
| 2004 | 27 | 103 |
| 2003 | 24 | 99 |
| 2002 | 21 | 99 |
| 2001 | 19 | 100 |
| 2000 | 17 | 103 |
| 1999 | 17 | 96 |
| 1998 | 20 | 89 |
| 1997 | 21 | 92 |
| 1996 | 21 | 87 |
| 1995 | 19 | 90 |
| 1994 | 16 | 88 |
| 1993 | 14 | 82 |
| 1992 | 13 | 85 |
| 1991 | 11 | 86 |
| 1990 | 10 | 90 |
| 1989 | 10 | 89 |
| 1988 | 11 | 81 |
| 1987 | 10 | 84 |
| 1986 | 12 | 73 |