| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 37 | 126 |
| 2015 | 40 | 128 |
| 2014 | 42 | 135 |
| 2013 | 43 | 134 |
| 2012 | 44 | 132 |
| 2011 | 44 | 131 |
| 2010 | 38 | 129 |
| 2009 | 29 | 132 |
| 2008 | 30 | 140 |
| 2007 | 26 | 136 |
| 2006 | 23 | 129 |
| 2005 | 24 | 123 |
| 2004 | 22 | 118 |
| 2003 | 17 | 122 |
| 2002 | 18 | 114 |
| 2001 | 17 | 114 |
| 2000 | 19 | 108 |
| 1999 | 21 | 101 |
| 1998 | 27 | 94 |
| 1997 | 31 | 88 |
| 1996 | 28 | 88 |
| 1995 | 27 | 88 |
| 1994 | 22 | 84 |
| 1993 | 18 | 84 |
| 1992 | 22 | 76 |
| 1991 | 21 | 71 |
| 1990 | 18 | 76 |
| 1989 | 16 | 76 |
| 1988 | 13 | 81 |
| 1987 | 12 | 83 |
| 1986 | 11 | 81 |