| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 31 | 133 |
| 2015 | 32 | 136 |
| 2014 | 36 | 140 |
| 2013 | 36 | 138 |
| 2012 | 36 | 136 |
| 2011 | 36 | 137 |
| 2010 | 25 | 141 |
| 2009 | 24 | 139 |
| 2008 | 26 | 141 |
| 2007 | 21 | 142 |
| 2006 | 17 | 144 |
| 2005 | 15 | 138 |
| 2004 | 14 | 137 |
| 2003 | 13 | 132 |
| 2002 | 16 | 121 |
| 2001 | 12 | 124 |
| 2000 | 11 | 126 |
| 1999 | 13 | 119 |
| 1998 | 16 | 109 |
| 1997 | 22 | 99 |
| 1996 | 25 | 91 |
| 1995 | 21 | 91 |
| 1994 | 19 | 94 |
| 1993 | 18 | 83 |
| 1992 | 15 | 93 |
| 1991 | 12 | 93 |
| 1990 | 10 | 99 |
| 1989 | 9 | 101 |
| 1988 | 7 | 106 |
| 1987 | 6 | 108 |
| 1986 | 7 | 105 |