Commodity200520062007200820092011
Dictating machines not capable of op. without an ext. source of power $395    
Telephone answering machines$936$1,958$177$4,040$3,380$281,836
Magnetic tape recorders incorp. sound repr. app., n.e.s. in 85.20$333,664$143,721    
Sound recording app., whether or not incorp. a sound repr. device, n.e.s. i ...$1,009,515$612,115    
Total$1,344,115$758,189$177$4,040$3,380$281,836