Census The Population Census of India, conducted every ten years, is the most comprehensive source of information on the size, distribution, living conditions and demographic characteristics of the population. It is also an important source of the religious, linguistic and cultural profiles of the people. It serves therefore, both as a tool of the State polices and as a means for understanding the socio-economic transformation of the society, economy and polity of the nation. The census of a country is a valued symbol of the Nation State as a concept.In India, a census over different parts at different time points was first conducted during the period 1867-72, being known as the Census of 1872. However, since 1881 a Population Census has been conducted in the country regularly every ten years and the Census 2001 is the 14th and the latest in the series. With each census the scope and the coverage has been enlarged, particularly since the Census 1961, in order to provide meaningful information for developmental planning as also to make it more responsive to the present day requirements. The provisional totals of the Census 2001 conducted during February-March 2001 have been released on 26 March 2001 and have placed India’s population at 1027 million on 1 March 2001. Provisional totals of the population at the district level, by sex, in broad age categories 0 to 6 and 7+, literate and illiterates among men and women aged 7 and above are already available for all the States and UTs.Current Status :The Population Census is a Union subject and the Ministry of Home Affairs is in charge of this subject. It is listed at serial No. 69 in the seventh schedule of Article 256 of the Constitution of India. The Population Census is taken as per the provisions of the Census Act, 1948, which empowers the Central Government to conduct a Census of the population of the country after duly notifying it. The Act places a legal obligation upon the public to cooperate and give truthful answers and also places a legal obligation upon the enumerator to record the responses faithfully. The Act guarantees confidentiality of information to the individuals. The responsibility to conduct the decennial Population Census under the Census Act lies with the Office of the Registrar General and Census Commissioner, India. Though the Census is a Union subject, the actual conduct of the Indian census has always been the joint endeavour of both Central and State Governments. The entire field operation, which includes house listing and population enumeration are organised through the general administrative machinery of the States at various levels. At the State and UT level, the Director of Census Operations appointed under the Census Act is responsible for organising and supervising the census operation within his State and UT. The census is the only comprehensive source of demographic information right up to the lowest levels. The information collected includes details of the census house, its status residential or non-residential, amenities, information on households and the occupants such as sex, age, marital status, religion, mother tongue and language, scheduled caste, scheduled tribe, literacy, educational level attained, place of birth and past residence, economic activity, migration, fertility and information collected occasionally through questions included to understand specific problems such as disability, ex-servicemen and pensioners. The Population Census thus gives a detailed picture of the national economy and of society; it’s various administrative units like States or UTs, districts, tehsils or talukas or anchals, etc. and for each city, town and village with changes over time. It generates a wealth of information, which is utilised by the country for planning purposes, determining the seats in the Lok Sabha and the State Legislatures, delimitation of electoral boundaries and for various types of developmental programmes. In the era of decentralised planning, the census has the potential to provide a much-needed database to formulate programme and polices at the local level.The results of the Population Census data are published in various tables categorised into six broad categories indicating the nature of topics covered in each series. These are:A Series: General Population TablesB Series: General Economic TablesC Series: Social and Cultural TablesD Series: Migration TablesF Series: Fertility TablesH Series: Tables on Houses and Household Amenities.Concepts and DefinitionsThe concepts and definitions used in the Population Census have often changed in the past to enhance the coverage and sometimes because of the need to adopt standardised concepts and definitions. For example, the definitions of economic activity, of workers and non-workers have been improved. The definition of economic activity was expanded in Census 1991 and has been further expanded in Census 2001 to include certain non-market activities, thus bringing it closer to the ILO definition. This however, poses problems in comparability of data from one census to another, as comparable data are not published to study the effect of the improved definition.Quality Aspects and Post Enumeration Check MethodologyThough the data collected over successive censuses has become more accurate and reliable in quality, still discrepancies do creep in due to a lack of technically qualified persons, poor response from the respondents, illiteracy of the masses, a widely scattered population, lack of adequate financial resources, etc. The quality of the census data therefore, needs to be ensured through better training of the enumerators in the concepts and definitions used, making more aids available to the enumerators to facilitate probing and a vigilant supervisory mechanism to reduce the content and coverage errors as far as possible. The Post Enumeration Check (PEC) is carried out with the objective of estimating the coverage errors in the census of houses and population and to get an estimate of the extent of content error. The sampling design used for PEC is however, quite old and needs a fresh look. Further, the conduct of PEC by the State Government staff raises some doubt on the integrity of the PEC, which should better, be entrusted to an independent agency. Non-Tabulation of certain collected informationIn every Population Census, valuable data are collected during