| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 93 | 89 |
| 2015 | 91 | 104 |
| 2014 | 87 | 107 |
| 2013 | 84 | 110 |
| 2012 | 76 | 111 |
| 2011 | 63 | 117 |
| 2010 | 51 | 120 |
| 2009 | 41 | 124 |
| 2008 | 21 | 144 |
| 2007 | 24 | 135 |
| 2006 | 24 | 130 |
| 2005 | 28 | 122 |
| 2004 | 29 | 117 |
| 1999 | 32 | 94 |
| 1998 | 30 | 94 |
| 1997 | 42 | 85 |
| 1996 | 40 | 84 |
| 1995 | 35 | 85 |
| 1994 | 30 | 72 |
| 1993 | 31 | 72 |
| 1992 | 32 | 67 |
| 1991 | 36 | 66 |
| 1990 | 40 | 59 |
| 1989 | 37 | 52 |
| 1988 | 36 | 54 |
| 1987 | 33 | 55 |
| 1986 | 29 | 56 |