| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 166 | 77 |
| 2015 | 169 | 78 |
| 2014 | 156 | 85 |
| 2013 | 122 | 91 |
| 2012 | 119 | 89 |
| 2011 | 89 | 100 |
| 2010 | 86 | 95 |
| 2009 | 77 | 93 |
| 2008 | 83 | 99 |
| 2007 | 58 | 102 |
| 2006 | 52 | 100 |
| 2005 | 41 | 100 |
| 2004 | 29 | 109 |
| 2003 | 27 | 99 |
| 2002 | 16 | 120 |
| 2001 | 18 | 110 |
| 2000 | 13 | 120 |
| 1999 | 15 | 114 |
| 1998 | 15 | 111 |
| 1997 | 11 | 122 |
| 1996 | 14 | 111 |
| 1995 | 11 | 117 |
| 1994 | 10 | 114 |
| 1993 | 8 | 114 |
| 1992 | 8 | 112 |
| 1991 | 5 | 121 |
| 1990 | 11 | 97 |
| 1989 | 9 | 99 |
| 1988 | 11 | 89 |
| 1987 | 11 | 91 |
| 1986 | 11 | 83 |