| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 18 | 149 |
| 2015 | 29 | 140 |
| 2014 | 45 | 131 |
| 2013 | 61 | 122 |
| 2012 | 53 | 127 |
| 2011 | 48 | 130 |
| 2010 | 40 | 126 |
| 2009 | 32 | 128 |
| 2008 | 35 | 133 |
| 2007 | 29 | 130 |
| 2006 | 23 | 130 |
| 2005 | 17 | 132 |
| 2004 | 17 | 132 |
| 2003 | 14 | 131 |
| 2002 | 11 | 127 |
| 2001 | 11 | 129 |
| 2000 | 12 | 125 |
| 1999 | 12 | 121 |
| 1998 | 12 | 118 |
| 1997 | 17 | 109 |
| 1996 | 17 | 103 |
| 1995 | 15 | 106 |
| 1994 | 15 | 98 |
| 1993 | 13 | 98 |
| 1992 | 15 | 92 |
| 1991 | 16 | 85 |
| 1990 | 12 | 94 |
| 1989 | 15 | 78 |
| 1988 | 14 | 78 |
| 1987 | 12 | 84 |
| 1986 | 11 | 86 |