| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 18 | 120 |
| 2015 | 17 | 145 |
| 2014 | 18 | 147 |
| 2013 | 17 | 151 |
| 2012 | 15 | 153 |
| 2011 | 19 | 149 |
| 2010 | 17 | 152 |
| 2009 | 16 | 150 |
| 2008 | 13 | 155 |
| 2007 | 11 | 155 |
| 2006 | 10 | 153 |
| 2005 | 9 | 151 |
| 2004 | 9 | 148 |
| 2003 | 8 | 146 |
| 2002 | 6 | 146 |
| 2001 | 6 | 145 |
| 2000 | 6 | 143 |
| 1999 | 7 | 132 |
| 1998 | 8 | 133 |
| 1997 | 6 | 139 |
| 1996 | 6 | 135 |
| 1995 | 5 | 137 |
| 1994 | 4 | 124 |
| 1993 | 4 | 119 |
| 1992 | 7 | 109 |
| 1991 | 7 | 110 |
| 1990 | 7 | 108 |
| 1989 | 6 | 92 |
| 1988 | 6 | 92 |
| 1987 | 6 | 91 |
| 1986 | 5 | 88 |