Aged 16-74. IUPH1 - Making calls (including video calls) over the internet, for example, via Skype, Messenger, WhatsApp, FaceTime, Viber, Snapchat, Zoom, MS Teams, WebEx
  1 - Ticked
  0 - Not ticked
  9 - Not applicable (IU=Blank or IU ne 1)

Individuals Making calls using VoIP or messaging apps
sum of IND_WGHT where (IUPH1 =1)