| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 14 | 95 |
| 2015 | 18 | 101 |
| 2014 | 17 | 106 |
| 2013 | 16 | 110 |
| 2012 | 17 | 108 |
| 2011 | 23 | 98 |
| 2010 | 21 | 96 |
| 2009 | 19 | 97 |
| 2008 | 16 | 103 |
| 2007 | 12 | 106 |
| 2006 | 12 | 99 |
| 2005 | 12 | 97 |
| 2004 | 12 | 92 |
| 2003 | 12 | 90 |
| 2002 | 14 | 81 |
| 2001 | 6 | 109 |
| 2000 | 6 | 107 |
| 1999 | 6 | 108 |
| 1998 | 6 | 114 |
| 1997 | 8 | 99 |
| 1996 | 7 | 102 |
| 1995 | 4 | 126 |
| 1994 | 3 | 115 |
| 1993 | 9 | 77 |
| 1992 | 6 | 85 |
| 1991 | 9 | 79 |
| 1990 | 7 | 83 |
| 1989 | 6 | 72 |
| 1988 | 6 | 71 |
| 1987 | 5 | 75 |
| 1986 | 5 | 72 |