| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 55 | 114 |
| 2015 | 56 | 117 |
| 2014 | 65 | 120 |
| 2013 | 66 | 115 |
| 2012 | 64 | 119 |
| 2011 | 59 | 121 |
| 2010 | 48 | 118 |
| 2009 | 47 | 110 |
| 2008 | 65 | 104 |
| 2007 | 49 | 109 |
| 2006 | 37 | 110 |
| 2005 | 35 | 106 |
| 2004 | 28 | 110 |
| 2003 | 24 | 106 |
| 2002 | 20 | 108 |
| 2001 | 17 | 113 |
| 2000 | 15 | 118 |
| 1999 | 16 | 112 |
| 1998 | 15 | 114 |
| 1997 | 13 | 117 |
| 1996 | 14 | 110 |
| 1995 | 14 | 108 |
| 1994 | 10 | 115 |
| 1993 | 11 | 102 |
| 1992 | 10 | 103 |
| 1991 | 12 | 95 |
| 1990 | 12 | 92 |
| 1989 | 12 | 92 |
| 1988 | 11 | 92 |
| 1987 | 10 | 93 |
| 1986 | 10 | 89 |