Estimates of yearly data cause of gaps with censufigures

　　 saveragehouseholdsizeisbelowthe"three-person-family"/XINHUAAftertheseventhnationalandprovincialcensusdatawerereleased,somepeoplemighthavebeensurprisedtodiscoverthatmanyindexes,includingthetotalpopulation,populationgrowth,ageandgenderstructures,andthedistributionofpopulationbetweenurbanandruralareasandamongethnicgroups,arenotconsistent－evenhaverelativelylargedifferences－,the0-14-year-oldpopulationintheseventhnationalcensusis253million,14millionmorethanthetotalnumberofbirths,239million,intheprevious15years－,thepopulationaged0-14shouldhavebeenmuchle"suddenly",suchasthebirthrate,deathrate,populationgrowthrate,totalpopulation,andtheageandethnicstructures,areallbasedoncomprehensiveandscientificanalysis,calculationandestimationofvitalstatistics,migrationregistrationdata,,thepopulationdatapublishedinnon-censusyears,suchasthetotalpopulation,populationstructureandgrowthrate,andethnicstructure,arenotdatafromadirectcensus,,thebirthrate,populationgrowthrateandtotalpopulationpublishedeachyear,too,areestimatesbasedonacomprehensiveanalysisofbirthsanddeathsfromthevitalstatisticssystem,internationalmigrationregistrationdata,,theannualpopulationdatainnon-censusyearsareoftenbasedonsamplesurveys,whichmakeapopulationsurveyona1/1,000basis,calculatevariouspopulationindicatorsaccordingtothesamples,andusethesestatisticalindicatorstocalculatethegeneralpopulationandestimatetheoverallpopulationindicators,suchasthegrowthrate,,whichinevitablywillhavesomesamplingerrors,theseestimateswillbeclosetothecensusdata,ccuratelycalculated,suchasthebirthrate,ethnicminoritycompositionandpopulationindicators,,accordingtotheseventhnationalcensus,,,,,NortheastChinaandtheXinjiangUygurautonomousregioninthiscensustonottallywiththepreviouslyannouncedannualpopulationdata,becausetheestimatesbasedonsamplesurveys,whichusuallyareclosetobutnotnecessarilyaspreciseastheauthenticcensusdata,non-censusyearsdonotmatch,andwhichshouldbeconsideredaccurateGiventhattheannualdatainnon-censusyearsareestimatesandthecensusdataarethedirectresultsofinvestigationanduniversalsurvey,thelatteraregenerallyusedbytheinternationalcommunityasthestandard,and"inter-censuspopulationestimationtechnology"isusedtoverifyandrevisethemainindicatorsoftheannualpopulationdatabetweenthetwocensuses,soastomakethesp,inCanada,therevisionoft,theUSalsoreviseditspopulationdatafrom200,China,too,usedthe"inter-censuspopulationestimationtechnology"torevisetheannualbirthrateandpopulationgrowthratefrom2000to2010,,,lowerthanthatof1982andarecordlowcomparedwiththepreviouscensuses,makingitthemostaccuratecensussincethefoundingofthePeople,whichhighlightedtheinconsistenciesbetweenthecensusdataandsomeannualdatainnon-censusyears,,theNationalBureauofStatistics,basedonthemoreaccurateandauthoritativecensusdata,hasverifiedandrevisedthedataonbirthratesandgrowthratesatthenationallevel,givingatruerandmoreaccuratepictureofChinatnecessarilyreflectthoseofChinaDaily.。