Privacy shows the split between private and non-private dwellings. A private dwelling is a house, unit, apartment, or similar place used by one household. A non-private dwelling is a place like a hotel, hospital, prison, or nursing home.
The figures come from Census data collected by the Australian Bureau of Statistics.
From the jump-off year on, privacy rates are carried forward and applied to total dwellings each year to estimate the number of private and non-private dwellings.