Preliminary data of the 2010 Census already reveal changes in the Brazilian population pyramidWith 80% of the Brazilian population already enumerated, preliminary data of the 2010 Census indicate that the Brazilian population pyramid has changed in the last decade. In 2000, children aged up to 4 represented 9.64% of the Brazilian population; nowadays they are 7.17%. Those aged 5 to 9 were 9.74%, a percentage that declined to 7.79%. The population aged up to 24 accounted for 49.68% of Brazilians 10 years ago; now it is 41.95%.Conversely, at the end of the 2000 Census, approximately 24.5 thousand Brazilians aged over 100 were found. This year, with the operation still in progress, records already reach more than 17 thousand. The decreased fertility and mortality rates, together with a longer life expectancy, explain this change in the demographic pattern, states IBGEs president Eduardo Pereira Nunes, during the release of the third balance of the 2010 Census data collection.The Census has already counted 154 million BraziliansThe 2010 Census had already counted 80% of the Brazilian population, around 154.2 million people, up to 12 oclock of this Monday, September 27. Besides, enumerators had visited 57.8 million households. Collection continues until October 31, and where it is already finished, the last step of data verification has begun. In this step, IBGE asks the help of residents, which may also receive the visit of professionals who will go to field after enumeration to supervise the conducted work.At least 600 thousand households will receive supervisors visitWith data collection progress, supervision of information received by IBGE has begun. In this phase, when at least 600 thousand households will be visited, supervisors will go to field to check the quality of enumerators work. IBGE asks the population to welcome supervisors as friendly as they had welcomed enumerators.Interviews continue up to October 31Since August 1st, around 191 thousand enumerators have collected information for the 12th Brazilian Population Census, the first to be totally computerized. Up to October 31, they will visit all households in the 5,565 Brazilian municipalities, so that IBGE may reveal a new portrait of the country, by means of a set of demographic socio-economic and housing information.Enumerators may be identified due to their uniform (the 2010Cansus waistcoat and cap, see images below), by their identity document (with name and photograph), which will be visible at the waistcoat pocket and by the data collection device (PDA). Their identity may be checked via a toll-free number (0800-7218181), from 8 a.m. to 10 p.m., and at the 2010 Census site, at www.censo2010.ibge.gov.br/recenseadores.php.Each enumerator may organize a work schedule in order to interview at least a resident that may inform on all residents, in all the households designated to him. In case he cannot find someone during working hours, he may make visits at night, during weekends or even on holidays.Population will greatly benefit from the CensusThe Census is the main data source about populations life in municipalities and localities. It collects information to define public policies at national, state and municipal level. Census results also help private initiative to take decisions on