Complete Housing Models: The entire range of Housing Units is the number of occupied units + the amount of vacant units. Possession is defined by whether the device is occupied by an operator or by a tenant.?????m b?o an toàn, l?nh chuy?n ti?n di?n ra suôn s?? ng??i ch?i c?n ?áp ?ng ??y ???nh?ng quy ??nh chi ti?t nh? sau:S. Census questionnaire,