| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 50 | 100 |
| 2015 | 64 | 98 |
| 2014 | 105 | 90 |
| 2013 | 114 | 87 |
| 2012 | 130 | 80 |
| 2011 | 125 | 84 |
| 2010 | 89 | 87 |
| 2009 | 72 | 88 |
| 2008 | 103 | 83 |
| 2007 | 77 | 88 |
| 2006 | 76 | 82 |
| 2005 | 62 | 83 |
| 2004 | 51 | 81 |
| 2003 | 44 | 82 |
| 2002 | 37 | 83 |
| 2001 | 36 | 81 |
| 2000 | 39 | 79 |
| 1999 | 26 | 84 |
| 1998 | 21 | 88 |
| 1997 | 25 | 86 |
| 1996 | 25 | 82 |
| 1995 | 24 | 81 |
| 1994 | 22 | 79 |
| 1993 | 22 | 74 |
| 1992 | 24 | 70 |
| 1991 | 27 | 63 |
| 1990 | 22 | 67 |
| 1989 | 19 | 68 |
| 1988 | 17 | 66 |
| 1987 | 19 | 64 |
| 1986 | 18 | 63 |