| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 70 | 91 |
| 2015 | 77 | 95 |
| 2014 | 91 | 96 |
| 2013 | 91 | 95 |
| 2012 | 87 | 95 |
| 2011 | 79 | 100 |
| 2010 | 67 | 97 |
| 2009 | 54 | 95 |
| 2008 | 59 | 99 |
| 2007 | 45 | 103 |
| 2006 | 40 | 100 |
| 2005 | 34 | 98 |
| 2004 | 29 | 98 |
| 2003 | 22 | 105 |
| 2002 | 19 | 104 |
| 2001 | 21 | 96 |
| 2000 | 23 | 94 |
| 1999 | 22 | 89 |
| 1998 | 28 | 81 |
| 1997 | 27 | 82 |
| 1996 | 24 | 85 |
| 1995 | 21 | 85 |
| 1994 | 19 | 82 |
| 1993 | 16 | 79 |
| 1992 | 17 | 78 |
| 1991 | 16 | 75 |
| 1990 | 17 | 77 |
| 1989 | 16 | 74 |
| 1988 | 14 | 74 |
| 1987 | 12 | 76 |
| 1986 | 11 | 76 |