| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 81 | 102 |
| 2015 | 95 | 100 |
| 2014 | 115 | 94 |
| 2013 | 116 | 95 |
| 2012 | 117 | 90 |
| 2011 | 107 | 92 |
| 2010 | 86 | 94 |
| 2009 | 69 | 99 |
| 2008 | 91 | 96 |
| 2007 | 56 | 103 |
| 2006 | 48 | 101 |
| 2005 | 39 | 102 |
| 2004 | 31 | 106 |
| 2003 | 22 | 110 |
| 2002 | 20 | 107 |
| 2001 | 31 | 92 |
| 2000 | 35 | 84 |
| 1999 | 34 | 85 |
| 1998 | 38 | 80 |
| 1997 | 37 | 82 |
| 1996 | 33 | 78 |
| 1995 | 29 | 84 |
| 1994 | 28 | 76 |
| 1993 | 23 | 75 |
| 1992 | 20 | 78 |
| 1991 | 16 | 84 |
| 1990 | 13 | 89 |
| 1989 | 12 | 93 |
| 1988 | 12 | 88 |
| 1987 | 11 | 87 |
| 1986 | 9 | 98 |