| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 126 | 84 |
| 2015 | 126 | 87 |
| 2014 | 119 | 93 |
| 2013 | 107 | 98 |
| 2012 | 114 | 93 |
| 2011 | 93 | 97 |
| 2010 | 68 | 100 |
| 2009 | 58 | 103 |
| 2008 | 65 | 105 |
| 2007 | 54 | 104 |
| 2006 | 48 | 102 |
| 2005 | 39 | 101 |
| 2004 | 32 | 105 |
| 2003 | 26 | 102 |
| 2002 | 23 | 101 |
| 2001 | 21 | 104 |
| 2000 | 19 | 107 |
| 1999 | 16 | 111 |
| 1998 | 12 | 119 |
| 1997 | 11 | 125 |
| 1996 | 11 | 123 |
| 1995 | 12 | 116 |
| 1994 | 7 | 128 |
| 1993 | 5 | 132 |
| 1992 | 4 | 132 |
| 1991 | 2 | 141 |
| 1990 | 2 | 147 |
| 1989 | 1 | 148 |
| 1988 | 1 | 148 |
| 1987 | 1 | 145 |
| 1986 | 1 | 144 |