| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 127 | 41 |
| 2015 | 118 | 52 |
| 2014 | 133 | 49 |
| 2013 | 122 | 49 |
| 2012 | 111 | 50 |
| 2011 | 113 | 50 |
| 2010 | 100 | 51 |
| 2009 | 98 | 50 |
| 2008 | 98 | 52 |
| 2007 | 66 | 56 |
| 2006 | 51 | 56 |
| 2005 | 41 | 56 |
| 2004 | 35 | 54 |
| 2003 | 14 | 73 |
| 2002 | 12 | 74 |
| 2001 | 11 | 73 |
| 2000 | 11 | 71 |
| 1999 | 12 | 67 |
| 1998 | 12 | 67 |
| 1997 | 11 | 66 |
| 1996 | 10 | 65 |
| 1995 | 10 | 60 |
| 1994 | 10 | 60 |
| 1993 | 9 | 59 |
| 1992 | 9 | 52 |
| 1991 | 8 | 49 |
| 1990 | 7 | 52 |
| 1989 | 6 | 54 |
| 1988 | 6 | 51 |
| 1987 | 5 | 52 |
| 1986 | 4 | 58 |