| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 65 | 79 |
| 2015 | 79 | 90 |
| 2014 | 116 | 81 |
| 2013 | 127 | 83 |
| 2012 | 138 | 76 |
| 2011 | 136 | 80 |
| 2010 | 94 | 84 |
| 2009 | 70 | 84 |
| 2008 | 107 | 80 |
| 2007 | 87 | 81 |
| 2006 | 84 | 77 |
| 2005 | 68 | 78 |
| 2004 | 53 | 77 |
| 2003 | 42 | 78 |
| 2002 | 35 | 80 |
| 2001 | 34 | 79 |
| 2000 | 38 | 75 |
| 1999 | 25 | 84 |
| 1998 | 21 | 85 |
| 1997 | 29 | 77 |
| 1996 | 29 | 76 |
| 1995 | 26 | 77 |
| 1994 | 22 | 66 |
| 1993 | 23 | 64 |
| 1992 | 25 | 59 |
| 1991 | 22 | 64 |
| 1990 | 22 | 63 |
| 1989 | 18 | 58 |
| 1988 | 14 | 60 |
| 1987 | 16 | 55 |
| 1986 | 14 | 58 |