| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 85 | 86 |
| 2015 | 84 | 91 |
| 2014 | 96 | 93 |
| 2013 | 95 | 94 |
| 2012 | 73 | 100 |
| 2011 | 78 | 101 |
| 2010 | 65 | 98 |
| 2009 | 51 | 97 |
| 2008 | 64 | 97 |
| 2007 | 47 | 100 |
| 2006 | 35 | 108 |
| 2005 | 32 | 102 |
| 2004 | 29 | 99 |
| 2003 | 26 | 95 |
| 2002 | 23 | 93 |
| 2001 | 24 | 92 |
| 2000 | 9 | 119 |
| 1999 | 7 | 120 |
| 1998 | 10 | 111 |
| 1997 | 11 | 110 |
| 1996 | 10 | 109 |
| 1995 | 9 | 112 |
| 1994 | 8 | 111 |
| 1993 | 7 | 101 |
| 1992 | 7 | 102 |
| 1991 | 7 | 95 |
| 1990 | 10 | 92 |
| 1989 | 10 | 87 |
| 1988 | 5 | 102 |
| 1987 | 4 | 110 |
| 1986 | 2 | 122 |