Commodity2005200620072008200920102011
Dictating machines not capable of op. without an ext. source of power$3,056$3,928     
Telephone answering machines$128,810$91,935$119,751$110,929$27,139$291,299$19,496
Magnetic tape recorders incorp. sound repr. app., n.e.s. in 85.20$269,561$1,188,110     
Sound recording app., whether or not incorp. a sound repr. device, n.e.s. i ...$739,167$2,480,969     
Total$1,140,594$3,764,942$119,751$110,929$27,139$291,299$19,496