| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 38 | 119 |
| 2015 | 40 | 138 |
| 2014 | 53 | 133 |
| 2013 | 59 | 133 |
| 2012 | 54 | 133 |
| 2011 | 52 | 132 |
| 2010 | 45 | 131 |
| 2009 | 38 | 132 |
| 2008 | 42 | 134 |
| 2007 | 33 | 133 |
| 2006 | 29 | 130 |
| 2005 | 23 | 134 |
| 2004 | 21 | 134 |
| 2003 | 18 | 129 |
| 2002 | 17 | 126 |
| 2001 | 15 | 125 |
| 2000 | 17 | 120 |
| 1999 | 18 | 120 |
| 1998 | 22 | 109 |
| 1997 | 20 | 111 |
| 1996 | 19 | 110 |
| 1995 | 18 | 112 |
| 1994 | 16 | 107 |
| 1993 | 15 | 108 |
| 1992 | 19 | 97 |
| 1991 | 18 | 96 |
| 1990 | 18 | 94 |
| 1989 | 17 | 83 |
| 1988 | 16 | 79 |
| 1987 | 15 | 81 |
| 1986 | 19 | 71 |