| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 33 | 130 |
| 2015 | 33 | 135 |
| 2014 | 44 | 132 |
| 2013 | 45 | 132 |
| 2012 | 43 | 133 |
| 2011 | 41 | 134 |
| 2010 | 38 | 130 |
| 2009 | 33 | 126 |
| 2008 | 44 | 121 |
| 2007 | 33 | 123 |
| 2006 | 22 | 131 |
| 2005 | 18 | 130 |
| 2004 | 14 | 140 |
| 2003 | 13 | 134 |
| 2002 | 10 | 136 |
| 2001 | 9 | 138 |
| 2000 | 9 | 135 |
| 1999 | 8 | 138 |
| 1998 | 9 | 132 |
| 1997 | 9 | 132 |
| 1996 | 9 | 133 |
| 1995 | 7 | 137 |
| 1994 | 4 | 149 |