| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 28 | 116 |
| 2015 | 27 | 120 |
| 2014 | 31 | 122 |
| 2013 | 35 | 122 |
| 2012 | 39 | 121 |
| 2011 | 35 | 123 |
| 2010 | 32 | 119 |
| 2009 | 23 | 119 |
| 2008 | 22 | 124 |
| 2007 | 24 | 120 |
| 2006 | 20 | 121 |
| 2005 | 19 | 118 |
| 2004 | 19 | 116 |
| 2003 | 17 | 111 |
| 2002 | 20 | 101 |
| 2001 | 12 | 112 |
| 2000 | 19 | 96 |
| 1999 | 19 | 93 |
| 1998 | 21 | 86 |
| 1997 | 25 | 84 |
| 1996 | 24 | 84 |
| 1995 | 21 | 84 |
| 1994 | 19 | 83 |
| 1993 | 16 | 80 |
| 1992 | 14 | 83 |
| 1991 | 15 | 78 |
| 1990 | 17 | 75 |
| 1989 | 15 | 77 |
| 1988 | 16 | 68 |
| 1987 | 14 | 69 |
| 1986 | 13 | 70 |