| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 20 | 143 |
| 2014 | 22 | 144 |
| 2013 | 22 | 148 |
| 2012 | 23 | 148 |
| 2011 | 24 | 146 |
| 2010 | 21 | 147 |
| 2009 | 17 | 148 |
| 2008 | 15 | 150 |
| 2007 | 16 | 146 |
| 2006 | 15 | 143 |
| 2005 | 14 | 140 |
| 2004 | 13 | 140 |
| 2003 | 10 | 138 |
| 2002 | 6 | 148 |
| 2001 | 7 | 140 |
| 2000 | 8 | 135 |
| 1999 | 5 | 141 |
| 1998 | 6 | 143 |
| 1997 | 6 | 138 |
| 1996 | 6 | 133 |
| 1995 | 6 | 132 |
| 1994 | 5 | 116 |
| 1993 | 6 | 111 |
| 1992 | 5 | 111 |
| 1991 | 5 | 115 |
| 1990 | 4 | 111 |
| 1989 | 2 | 107 |
| 1988 | 3 | 103 |
| 1987 | 2 | 103 |
| 1986 | 2 | 101 |