For many countries in the world censuses are the only source of information on the population in the country.
Each country is free to decide when the census will be conducted, it is only important that it takes place
around 2010. More on this topic can be found on the website of the UN, which as an umbrella organization prepares
guidelines and recommendations regarding the content of the data collected.
Conference of European Statisticians Recommendations for the 2010 Censuses of
Population and Housing