<P> Population censuses are conducted every tenth year in Nepal . The first was held in 1911 and the most recent was held in 2011 . </P> <P> Population censuses have been taken in Nigeria during colonial time in 1866, 1871, 1896, 1901, 1911, 1921 and 1952 . The censuses covered only the southern part of the country except for the 1952 census which was country wide, and the censuses before 1921 were based on administrative estimates rather than on an actual enumeration . </P> <P> Censuses during the independence were taken 1962, 1963, 1973, 1991 and 2006 . The results of the 1962 census were considered inaccurate enough that a new census was ordered on February 19, 1963 . The results from 1973 and 2006 were highly disputed, but no recounts were taken . The preliminary results for 2006 indicates a population of 140 million people . 700,000 enumerators were engaged in this operation . </P> <P> The two first male censuses was conducted during the 1660s and 1701 . Later statistical censuses were held in 1769, 1815, 1835, 1845, and 1855 . Norway's first nominative, complete census was taken in 1801, when Norway still was ruled by the Oldenburg dynasty of Denmark - Norway . The scope of the census followed the de jure principle, so military persons should be included as well as foreigners if they were residents . The 1801, 1865, 1900 and 1910 censuses are transcribed and made searchable on the internet . The census records are made publicly available when 100 years have passed . Since 1900, a census has been conducted every ten years . (However, the 1940 census was postponed to 1946, and the census after 1990 came in 2001 .) Since 2001 the population census has been combined with the housing statistics . The 2001 questionnaire only asked about households and who was living in them, while no questionnaires will be mailed out for the 2011 census, since the administrative data on households is sufficient . </P>

When was the last census held in nigeria