| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 20 | 132 |
| 2015 | 20 | 157 |
| 2014 | 23 | 157 |
| 2013 | 24 | 159 |
| 2012 | 25 | 156 |
| 2011 | 22 | 159 |
| 2010 | 18 | 156 |
| 2009 | 15 | 158 |
| 2008 | 16 | 158 |
| 2007 | 14 | 158 |
| 2006 | 11 | 156 |
| 2005 | 10 | 157 |
| 2004 | 8 | 158 |
| 2003 | 7 | 155 |
| 2002 | 8 | 150 |
| 2001 | 8 | 144 |
| 2000 | 8 | 141 |
| 1999 | 7 | 143 |
| 1998 | 8 | 143 |
| 1997 | 8 | 142 |
| 1996 | 8 | 144 |
| 1995 | 7 | 142 |
| 1994 | 6 | 137 |
| 1993 | 6 | 133 |
| 1992 | 6 | 130 |
| 1991 | 4 | 135 |
| 1990 | 3 | 138 |
| 1989 | 3 | 119 |
| 1988 | 3 | 115 |
| 1987 | 3 | 114 |
| 1986 | 3 | 117 |