| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 13 | 137 |
| 2015 | 14 | 139 |
| 2014 | 19 | 137 |
| 2013 | 27 | 126 |
| 2012 | 26 | 126 |
| 2011 | 27 | 125 |
| 2010 | 21 | 126 |
| 2009 | 14 | 132 |
| 2008 | 18 | 130 |
| 2007 | 15 | 132 |
| 2006 | 14 | 131 |
| 2005 | 6 | 146 |
| 2004 | 4 | 155 |
| 2003 | 3 | 157 |
| 2002 | 3 | 151 |
| 2001 | 4 | 146 |
| 2000 | 4 | 146 |
| 1999 | 4 | 145 |
| 1998 | 4 | 144 |
| 1997 | 4 | 140 |
| 1996 | 5 | 133 |
| 1995 | 5 | 129 |
| 1994 | 4 | 129 |
| 1993 | 4 | 116 |
| 1992 | 4 | 113 |
| 1991 | 4 | 106 |
| 1990 | 5 | 107 |
| 1989 | 4 | 110 |
| 1988 | 4 | 113 |
| 1987 | 4 | 104 |
| 1986 | 4 | 107 |