| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 26 | 61 |
| 2015 | 27 | 89 |
| 2014 | 27 | 89 |
| 2013 | 24 | 90 |
| 2012 | 23 | 90 |
| 2011 | 21 | 91 |
| 2010 | 22 | 85 |
| 2009 | 20 | 82 |
| 2008 | 20 | 85 |
| 2007 | 16 | 88 |
| 2006 | 14 | 88 |
| 2005 | 12 | 87 |
| 2004 | 10 | 86 |
| 2003 | 14 | 75 |
| 2002 | 14 | 67 |
| 2001 | 13 | 65 |
| 2000 | 11 | 72 |
| 1999 | 9 | 76 |
| 1998 | 9 | 76 |
| 1997 | 8 | 77 |
| 1996 | 7 | 74 |
| 1995 | 8 | 64 |
| 1994 | 7 | 65 |
| 1993 | 6 | 63 |
| 1992 | 6 | 61 |
| 1991 | 4 | 63 |
| 1990 | 3 | 71 |
| 1989 | 2 | 77 |
| 1988 | 1 | 78 |
| 1987 | 1 | 77 |
| 1986 | 1 | 84 |