|Unit||Ths. #, NSA|
|Adjustments||Not Seasonally Adjusted|
|Population||2018||4,857||4,792||Ths. #, NSA||Annual|
|Birth Rate||2015||14.1||14.6||# per Ths. pop.||Annual|
|Death Rate||2015||6.5||# per Ths. pop.||Annual|
Fore Ireland, the source releases population estimates by sex and age on an annual basis. The estimates are based on the most recent population census, which occurs every five years. The source adjust population for births, deaths, and estimated migration.
Localization: Usual residence
Data is generally updated within six months of the reference period. (around April each year). Generally data will be released a little bit later in the year following a census.
The population census collects information relating to persons and households. The survey size is about 1.4 million households. Variables collected include sex, households composition, age, location, marital status, language spoken, religion, membership of the Traveller Community, disability, commuting pattern, education, 3rd level qualification, carers, economic status, employment, occupation, place of work, industry and labour force as well as households variable such as Accomodation type, year built, nature of occupancy, rent paid, number of rooms, heating/water/sewerage facilities, cars, P.C. and internet access.
The source then trends forward the previous population census. The source provides the following example:
For example, the base population data for estimating the April 2012 figure was the number of males and females in each region by single year of age and nationality as established by the 2011 Census. From this base, each person was aged by one year, births for the period were added and deaths were subtracted.
The estimated number of immigrants was then added and the number of emigrants was subtracted. Allowance was also made for estimated inter-regional migration in arriving at the final 2012 figures.
The 2006 Census of Population data are first disaggregated by age and sex. The death and gross migration rates which these groups are assumed to experience in the following year are then applied. The assumed fertility rates are applied to the female population aged 15-49. The population projected in this way then becomes the base population for the following year. The whole procedure is repeated.
One hundred different single year age groups are distinguished (0-1 to 99+) for both males and females. After the base population is aged a year the appropriate survivorship ratios (see Appendix 3) are applied to it. Next the assumed migration effects are included. The assumed outward and inward flows are broken down by age and sex on the basis of the distributions estimated for the inter-censal period 2002-2006. This yields the surviving population adjusted for net migration but without an estimate of the number of children born in the year. The age specific fertility rates for the projection year are applied to the projected female population to estimate the projected births. These births are then divided into males and females on the basis of the ratios experienced for recent years. The appropriate survivorship ratios are then applied to male and female births before these are added in to yield the total projected population.
The assumed labour force participation rates are applied to the projected population aged 15 years and over to give the projected labour force.
Data is subject to revision. The source generally revises the previous year with each update, and the previous few years every time the population census is performed.