New Zealand Abridged Life Tables from 1993–95 to 2005–07

The data used to construct the abridged period life tables from 1993–95 to the 2005–07 three year period: deaths registered in New Zealand of people resident in each area in the December years from 1993–95 to the most recent three year period, respectively, by age groups (0, 1–4, 5–9, 10–15, ... , 80–84, 85 and over) and sex live births registered in New Zealand to mothers resident in each area in the December years from 1993–95, to the most recent three year period, respectively, by sex the mean year ended estimated resident population of New Zealand at 31 December from 1993–95, to the most recent three year period, respectively, by age groups (1–4, 5–9, 10–15, ... , 80–84, 85 and over) and sex. Deaths numerator The period life tables were compiled from deaths registered, rather than deaths occurring, in each respective three-year period. Most death statistics refer to registrations rather than occurrences for a given time period, because there is generally a time lag between when the death occurred and when it is registered. The number of death registrations can be confirmed before the number of death occurrences for a given time period. For periods of a year or more, the difference between registrations and occurrences is generally small, so death statistics referring to registrations are suitable for most purposes. Population denominator (exposed-to-risk population) 1996: Population concept used in the calculation of mortality rates changed from 'de facto' to 'resident'. The population concept used for population estimates and projections changed from de facto to resident. The de facto population includes all persons in New Zealand at a given time. It includes overseas visitors, but excludes residents temporarily overseas and net census undercount. The estimated resident population includes the estimated net census undercount and the estimated number of residents temporarily absent overseas, but does not include overseas visitors. Resident population estimates do not show the quarterly fluctuations that de facto estimates are subject to because of seasonal changes in the numbers of overseas visitors temporarily in New Zealand, and changes in the numbers of New Zealand residents temporarily out of New Zealand. Abridged period life tables from 1993–95 use the mean year ended estimated resident population of New Zealand at 31 December for the relevant three year period as the denominator to calculate death rates. Derived rates The period life tables were based on deaths averaged over three years. This is designed to reduce the impact of year-to-year statistical variations, particularly at younger ages where there may be a small number of deaths and at very old ages where the population at risk may be small. For some ages the subnational data does not enable death rates to be reliably estimated at all ages. en-NZ