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6Section A: Population and Population ProjectionsSection APopulation and Population ProjectionsPopulationTables are presented on the population of the State by Health Service Executive regions. Comparisonof Ireland's population with the population of other EU27 countries is also made. Results from theCensus of Population conducted in 2006 recorded a population of 4,239,848 persons on census night,an increase of 8% over the 2002 population and an increase of 17% over the 1996 population.Intercensal population estimates are also included in Table A2.Definitions• The young dependency ratio refers to the number of persons aged 0-14 years as a percentage ofthose aged 15-64 years.• The old dependency ratio refers to the number of persons aged 65 years and over as a percentageof those aged 15-64 years.• The total dependency ratio is the sum of the young and old ratios.FIGURE 8000000 A1TOTAL POPULATION: 1841-20067000000 7,000,0006000000 6,000,0005000000 5,000,000Number of Persons4000000 4,000,0003000000 3,000,0002000000 2,000,0001000000 1,000,0000184118411856185618711871188618861901190119161916193119311946194619611961196619661971197119791979198119811986198619911991199619962002200220062006YearSource: Central Statistics Office - Census of Population