| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 17 | 110 |
| 2015 | 17 | 131 |
| 2014 | 18 | 134 |
| 2013 | 18 | 136 |
| 2012 | 15 | 140 |
| 2011 | 17 | 135 |
| 2010 | 13 | 142 |
| 2009 | 11 | 140 |
| 2008 | 11 | 142 |
| 2007 | 6 | 146 |
| 2006 | 5 | 146 |
| 2005 | 5 | 146 |
| 2004 | 5 | 145 |
| 2003 | 4 | 145 |
| 2002 | 3 | 140 |
| 2001 | 4 | 134 |
| 2000 | 4 | 134 |
| 1999 | 3 | 140 |
| 1998 | 3 | 134 |
| 1997 | 4 | 133 |
| 1996 | 3 | 138 |
| 1995 | 3 | 138 |
| 1994 | 4 | 108 |
| 1993 | 6 | 99 |
| 1992 | 8 | 91 |
| 1991 | 9 | 91 |
| 1990 | 9 | 92 |