| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 45 | 114 |
| 2015 | 55 | 125 |
| 2014 | 84 | 113 |
| 2013 | 86 | 114 |
| 2012 | 100 | 107 |
| 2011 | 84 | 109 |
| 2010 | 96 | 101 |
| 2009 | 72 | 104 |
| 2008 | 78 | 106 |
| 2007 | 59 | 109 |
| 2006 | 37 | 120 |
| 2005 | 36 | 114 |
| 2004 | 60 | 94 |
| 2003 | 47 | 96 |
| 2002 | 23 | 111 |
| 2001 | 33 | 98 |
| 2000 | 22 | 108 |
| 1999 | 18 | 119 |
| 1998 | 15 | 120 |
| 1997 | 13 | 129 |
| 1996 | 10 | 137 |
| 1995 | 4 | 153 |
| 1994 | 1 | 166 |
| 1993 | 2 | 156 |
| 1992 | 2 | 153 |
| 1991 | 2 | 148 |
| 1990 | 2 | 147 |
| 1989 | 2 | 129 |
| 1988 | 2 | 118 |
| 1987 | 2 | 119 |
| 1986 | 1 | 124 |