Commodity200520062007200820092010
Dictating machines not capable of op. without an ext. source of power$308 $1,498 $190 
Telephone answering machines$1,201$801$3,980$17,837$77$861
Magnetic tape recorders incorp. sound repr. app., n.e.s. in 85.20$773$2,023 $67,266$42,350 
Sound recording app., whether or not incorp. a sound repr. device, n.e.s. i ...$1,834$4,587$1,425$628$857 
Total$4,116$7,411$6,903$85,731$43,474$861