| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 36 | 110 |
| 2015 | 45 | 110 |
| 2014 | 91 | 95 |
| 2013 | 90 | 96 |
| 2012 | 103 | 88 |
| 2011 | 119 | 85 |
| 2010 | 94 | 86 |
| 2009 | 61 | 92 |
| 2008 | 83 | 90 |
| 2007 | 56 | 96 |
| 2006 | 61 | 89 |
| 2005 | 47 | 93 |
| 2004 | 34 | 96 |
| 2003 | 27 | 93 |
| 2002 | 23 | 95 |
| 2001 | 21 | 97 |
| 2000 | 25 | 92 |
| 1999 | 16 | 100 |
| 1998 | 14 | 102 |
| 1997 | 17 | 99 |
| 1996 | 13 | 106 |
| 1995 | 12 | 107 |
| 1994 | 10 | 108 |
| 1993 | 11 | 92 |
| 1992 | 12 | 92 |
| 1991 | 10 | 90 |
| 1990 | 10 | 91 |
| 1989 | 9 | 92 |
| 1988 | 8 | 92 |
| 1987 | 10 | 83 |
| 1986 | 8 | 87 |