| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 16 | 92 |
| 2015 | 17 | 105 |
| 2014 | 17 | 107 |
| 2013 | 14 | 111 |
| 2012 | 14 | 111 |
| 2011 | 12 | 110 |
| 2010 | 12 | 108 |
| 2009 | 10 | 111 |
| 2008 | 8 | 123 |
| 2007 | 11 | 111 |
| 2006 | 10 | 107 |
| 2005 | 10 | 104 |
| 2004 | 10 | 99 |
| 2003 | 8 | 103 |
| 2002 | 8 | 101 |
| 2001 | 11 | 87 |
| 2000 | 10 | 87 |
| 1999 | 11 | 88 |
| 1998 | 12 | 85 |
| 1997 | 14 | 81 |
| 1996 | 17 | 72 |
| 1995 | 10 | 86 |
| 1994 | 12 | 70 |
| 1993 | 9 | 79 |
| 1992 | 5 | 97 |
| 1991 | 12 | 67 |
| 1990 | 13 | 65 |
| 1989 | 11 | 54 |
| 1988 | 12 | 53 |
| 1987 | 9 | 57 |
| 1986 | 10 | 54 |