Commodity2005200620072008200920102011
Multiple-walled insulating units of glass$31,851,169$39,443,887$65,386,529$92,450,720$79,988,953$108,287,956$113,527,437
Total$31,851,169$39,443,887$65,386,529$92,450,720$79,988,953$108,287,956$113,527,437