| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 75 | 89 |
| 2015 | 78 | 94 |
| 2014 | 84 | 99 |
| 2013 | 79 | 98 |
| 2012 | 79 | 98 |
| 2011 | 80 | 98 |
| 2010 | 70 | 95 |
| 2009 | 64 | 90 |
| 2008 | 79 | 91 |
| 2007 | 57 | 95 |
| 2006 | 52 | 95 |
| 2005 | 43 | 96 |
| 2004 | 39 | 88 |
| 2003 | 31 | 88 |
| 2002 | 28 | 88 |
| 2001 | 23 | 95 |
| 2000 | 19 | 98 |
| 1999 | 18 | 95 |
| 1998 | 18 | 94 |
| 1997 | 18 | 95 |
| 1996 | 18 | 93 |
| 1995 | 18 | 93 |
| 1994 | 14 | 93 |
| 1993 | 12 | 86 |
| 1992 | 12 | 90 |
| 1991 | 11 | 85 |
| 1990 | 11 | 88 |
| 1989 | 11 | 85 |
| 1988 | 10 | 85 |
| 1987 | 9 | 85 |
| 1986 | 7 | 89 |