| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 67 | 104 |
| 2015 | 63 | 123 |
| 2014 | 72 | 122 |
| 2013 | 73 | 123 |
| 2012 | 70 | 123 |
| 2011 | 64 | 127 |
| 2010 | 52 | 125 |
| 2009 | 53 | 114 |
| 2008 | 70 | 111 |
| 2007 | 54 | 113 |
| 2006 | 40 | 114 |
| 2005 | 37 | 113 |
| 2004 | 32 | 115 |
| 2003 | 27 | 116 |
| 2002 | 21 | 120 |
| 2001 | 18 | 116 |
| 2000 | 17 | 117 |
| 1999 | 18 | 117 |
| 1998 | 17 | 116 |
| 1997 | 16 | 118 |
| 1996 | 17 | 117 |
| 1995 | 18 | 110 |
| 1994 | 15 | 109 |
| 1993 | 17 | 102 |
| 1992 | 18 | 98 |
| 1991 | 17 | 99 |
| 1990 | 18 | 93 |
| 1989 | 15 | 85 |
| 1988 | 15 | 84 |
| 1987 | 15 | 82 |
| 1986 | 14 | 77 |