Commodity2005200620072008200920102011
Multiple-walled insulating units of glass$3,288,491$4,004,619$7,362,444$8,133,606$6,391,553$2,429,468$2,880,338
Total$3,288,491$4,004,619$7,362,444$8,133,606$6,391,553$2,429,468$2,880,338