Commodity2005200620072008200920102011
Dictating machines not capable of op. without an ext. source of power$363,342$282,518$129,349    
Telephone answering machines$150,702$151,912$132,842$70,943$33,859$34,191$23,279
Magnetic tape recorders incorp. sound repr. app., n.e.s. in 85.20$118,378$301,787$140,707    
Sound recording app., whether or not incorp. a sound repr. device, n.e.s. i ...$29,719,845$95,075,325$49,212,883    
Total$30,352,267$95,811,542$49,615,781$70,943$33,859$34,191$23,279