Commodity2005200620072008200920102011
Multiple-walled insulating units of glass$3,348,583$2,139,131$3,045,614$3,049,242$721,469$5,489,750$4,005,843
Total$3,348,583$2,139,131$3,045,614$3,049,242$721,469$5,489,750$4,005,843