| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 70 | 92 |
| 2015 | 85 | 90 |
| 2014 | 88 | 97 |
| 2013 | 60 | 103 |
| 2012 | 63 | 101 |
| 2011 | 69 | 102 |
| 2010 | 57 | 102 |
| 2009 | 44 | 102 |
| 2008 | 57 | 100 |
| 2007 | 47 | 101 |
| 2006 | 42 | 99 |
| 2005 | 33 | 101 |
| 2004 | 26 | 104 |
| 2003 | 22 | 104 |
| 2002 | 16 | 108 |
| 2001 | 18 | 102 |
| 2000 | 21 | 95 |
| 1999 | 19 | 94 |
| 1998 | 18 | 96 |
| 1997 | 22 | 90 |
| 1996 | 25 | 80 |
| 1995 | 27 | 79 |
| 1994 | 26 | 75 |
| 1993 | 26 | 70 |
| 1992 | 19 | 73 |
| 1991 | 15 | 80 |
| 1990 | 12 | 83 |
| 1989 | 14 | 79 |
| 1988 | 14 | 75 |
| 1987 | 12 | 77 |
| 1986 | 10 | 79 |