▁in ▁the ▁census ▁may ▁be ▁recorded ▁in ▁a ▁different ▁place ▁than ▁where ▁they ▁usually ▁live , ▁because ▁they ▁are ▁trav elling , ▁for ▁example ▁( this ▁may ▁result ▁in ▁over count ing ). ▁Con sequently , ▁raw ▁census ▁numbers ▁are ▁often ▁adjust ed ▁to ▁produce ▁census ▁estimates ▁that ▁identify ▁such ▁statistics ▁as ▁resident ▁population , ▁residents , ▁tour ists ▁and ▁other ▁visitors , ▁national s ▁and ▁al iens ▁( non - n ational s ). ▁For ▁priv acy ▁reasons , ▁particularly ▁when ▁there ▁are ▁small ▁counts , ▁some ▁census ▁results ▁may ▁be ▁rounded , ▁often ▁to ▁the ▁nearest ▁ten , ▁hundred , ▁thousand ▁and ▁sometimes ▁randomly ▁up , ▁down ▁or ▁to ▁another ▁small ▁number ▁such ▁as ▁within ▁ 3 ▁of ▁the ▁actual ▁count . ▁ ▁Between ▁cens uses , ▁administrative ▁data ▁collected ▁by ▁various ▁ag encies ▁about ▁population ▁events ▁such ▁as ▁birth s , ▁death s , ▁and ▁cross - border ▁migration ▁may ▁be ▁used ▁to ▁produce ▁inter c ens al ▁estimates . ▁ ▁Population ▁estimates ▁and ▁pro jections ▁Population ▁estimates ▁are ▁usually ▁derived ▁from ▁census ▁and ▁other ▁administrative ▁data . ▁Population ▁estimates ▁are ▁normally ▁produced ▁after ▁the ▁date ▁the ▁estimate ▁is ▁for . ▁ ▁Some ▁estimates , ▁such ▁as ▁the ▁Usually ▁resident ▁population ▁estimate ▁who ▁usually ▁lives ▁in ▁a ▁local ity ▁as ▁at ▁the ▁census ▁date , ▁even ▁though ▁the ▁census ▁did ▁not ▁count ▁them ▁within ▁that ▁local ity . ▁Census ▁questions ▁usually ▁include ▁a ▁questions ▁about ▁where ▁a ▁person ▁usually ▁lives , ▁whether ▁they ▁are ▁a ▁resident ▁or ▁visitor , ▁or