| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 28 | 128 |
| 2015 | 28 | 149 |
| 2014 | 28 | 149 |
| 2013 | 30 | 149 |
| 2012 | 23 | 157 |
| 2011 | 21 | 160 |
| 2010 | 18 | 155 |
| 2009 | 17 | 156 |
| 2008 | 16 | 159 |
| 2007 | 14 | 157 |
| 2006 | 12 | 154 |
| 2005 | 12 | 151 |
| 2004 | 11 | 152 |
| 2003 | 10 | 146 |
| 2002 | 7 | 151 |
| 2001 | 6 | 149 |
| 2000 | 6 | 147 |
| 1999 | 6 | 148 |
| 1998 | 7 | 145 |
| 1997 | 7 | 147 |
| 1996 | 6 | 149 |
| 1995 | 5 | 148 |
| 1994 | 3 | 150 |
| 1993 | 4 | 141 |
| 1992 | 6 | 127 |
| 1991 | 7 | 129 |
| 1990 | 7 | 124 |
| 1989 | 7 | 103 |
| 1988 | 7 | 98 |
| 1987 | 6 | 98 |
| 1986 | 6 | 100 |