| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 89 | 97 |
| 2015 | 106 | 92 |
| 2014 | 113 | 96 |
| 2013 | 101 | 102 |
| 2012 | 90 | 104 |
| 2011 | 79 | 104 |
| 2010 | 56 | 105 |
| 2009 | 48 | 108 |
| 2008 | 59 | 109 |
| 2007 | 60 | 100 |
| 2006 | 52 | 99 |
| 2005 | 45 | 97 |
| 2004 | 41 | 92 |
| 2003 | 32 | 93 |
| 2002 | 30 | 91 |
| 2001 | 28 | 95 |
| 2000 | 26 | 96 |
| 1999 | 20 | 102 |
| 1998 | 20 | 104 |
| 1997 | 21 | 102 |
| 1996 | 20 | 101 |
| 1995 | 20 | 92 |
| 1994 | 20 | 90 |
| 1993 | 20 | 81 |
| 1992 | 20 | 82 |
| 1991 | 19 | 76 |
| 1990 | 15 | 85 |
| 1989 | 15 | 81 |
| 1988 | 13 | 82 |
| 1987 | 11 | 89 |
| 1986 | 9 | 96 |