| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 18 | 128 |
| 2015 | 14 | 138 |
| 2014 | 20 | 136 |
| 2013 | 17 | 141 |
| 2012 | 19 | 135 |
| 2011 | 14 | 142 |
| 2010 | 15 | 138 |
| 2009 | 10 | 142 |
| 2008 | 13 | 140 |
| 2007 | 12 | 141 |
| 2006 | 10 | 137 |
| 2005 | 9 | 139 |
| 2004 | 7 | 137 |
| 2003 | 6 | 136 |
| 2002 | 7 | 128 |
| 2001 | 7 | 127 |
| 2000 | 7 | 128 |
| 1999 | 6 | 125 |
| 1998 | 7 | 116 |
| 1997 | 7 | 123 |
| 1996 | 7 | 121 |
| 1995 | 7 | 120 |
| 1994 | 5 | 120 |
| 1993 | 6 | 107 |
| 1992 | 5 | 109 |
| 1991 | 7 | 97 |
| 1990 | 7 | 100 |
| 1989 | 6 | 102 |
| 1988 | 5 | 101 |
| 1987 | 5 | 100 |
| 1986 | 5 | 97 |