Commodity2005200620072008200920102011
Dictating machines not capable of op. without an ext. source of power$10,208$8,139     
Telephone answering machines$3,488$4,490$5,908$3,185$1,246$999$86
Magnetic tape recorders incorp. sound repr. app., n.e.s. in 85.20$29,462$13,024     
Sound recording app., whether or not incorp. a sound repr. device, n.e.s. i ...$2,302,144$3,423,416     
Total$2,345,302$3,449,069$5,908$3,185$1,246$999$86