Census is the process of collecting, compiling and publishing demographic, economic and social data pertaining to specified time or times to all person in the country or territory. Census can be classified according to time interval it takes from one census to another or approach of undertaking the census.
Classification of census according to the time interval
According to time internal census can be classified as either quinquennial (census carried out after every five years) or decennial census (census carried out after every ten years).
Classification of census according to approach
According to approach census can be either de jure census or de facto census.
- De jure census this is one in which the people are counted according to their usual place of residence, where only permanent members of the household are counted.
- De facto census – this is an approach to undertaking a census in which people are counted wherever they are found on the day of census exercise, that is all people who stayed in the homeland for the night are counted.