| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 45 | 105 |
| 2015 | 57 | 102 |
| 2014 | 93 | 94 |
| 2013 | 100 | 91 |
| 2012 | 95 | 90 |
| 2011 | 98 | 92 |
| 2010 | 87 | 88 |
| 2009 | 54 | 96 |
| 2008 | 96 | 87 |
| 2007 | 63 | 91 |
| 2006 | 55 | 93 |
| 2005 | 51 | 88 |
| 2004 | 37 | 91 |
| 2003 | 31 | 89 |
| 2002 | 24 | 91 |
| 2001 | 25 | 87 |
| 2000 | 26 | 88 |
| 1999 | 24 | 88 |
| 1998 | 19 | 91 |
| 1997 | 30 | 79 |
| 1996 | 32 | 78 |
| 1995 | 27 | 77 |
| 1994 | 24 | 78 |
| 1993 | 23 | 73 |
| 1992 | 21 | 72 |
| 1991 | 22 | 65 |
| 1990 | 22 | 68 |
| 1989 | 16 | 73 |
| 1988 | 12 | 79 |
| 1987 | 13 | 75 |
| 1986 | 13 | 71 |