| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 18 | 148 |
| 2015 | 19 | 155 |
| 2014 | 26 | 148 |
| 2013 | 30 | 144 |
| 2012 | 31 | 142 |
| 2011 | 25 | 146 |
| 2010 | 19 | 151 |
| 2009 | 15 | 153 |
| 2008 | 19 | 150 |
| 2007 | 14 | 152 |
| 2006 | 12 | 153 |
| 2005 | 14 | 141 |
| 2004 | 9 | 153 |
| 2003 | 5 | 160 |
| 2002 | 4 | 162 |
| 2001 | 5 | 160 |
| 2000 | 5 | 160 |
| 1999 | 4 | 165 |
| 1998 | 4 | 159 |
| 1997 | 4 | 157 |
| 1996 | 5 | 158 |
| 1995 | 4 | 154 |
| 1994 | 4 | 152 |
| 1993 | 4 | 135 |
| 1992 | 4 | 136 |
| 1991 | 4 | 125 |
| 1990 | 4 | 128 |
| 1989 | 2 | 137 |
| 1988 | 2 | 136 |
| 1987 | 2 | 137 |
| 1986 | 2 | 135 |