| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 33 | 112 |
| 2015 | 42 | 111 |
| 2014 | 52 | 109 |
| 2013 | 45 | 114 |
| 2012 | 43 | 115 |
| 2011 | 45 | 116 |
| 2010 | 39 | 114 |
| 2009 | 36 | 109 |
| 2008 | 52 | 104 |
| 2007 | 42 | 105 |
| 2006 | 36 | 106 |
| 2005 | 29 | 106 |
| 2004 | 25 | 106 |
| 2003 | 23 | 102 |
| 2002 | 18 | 106 |
| 2001 | 17 | 103 |
| 2000 | 18 | 100 |
| 1999 | 16 | 99 |
| 1998 | 17 | 97 |
| 1997 | 19 | 93 |
| 1996 | 18 | 96 |
| 1995 | 17 | 97 |
| 1994 | 15 | 91 |
| 1993 | 19 | 75 |
| 1992 | 18 | 75 |
| 1991 | 18 | 71 |
| 1990 | 20 | 70 |
| 1989 | 17 | 71 |
| 1988 | 9 | 88 |
| 1987 | 8 | 89 |
| 1986 | 8 | 86 |