|Adjustments||Not Seasonally Adjusted|
|Births||2021 Q1||14,073||14,586||#, NSA||Quarterly|
|Deaths||2021 Q1||8,232||8,229||#, NSA||Quarterly|
|Population||2020 Q2||5,025,000||5,017,800||#, NSA||Quarterly|
|Birth Rate||2016||12.65||13.27||# per Ths. pop.||Annual|
|Death Rate||2016||6.64||# per Ths. pop.||Annual|
For New Zealand, estimated population by sex and age, for each subnational level. Also: migration, median age.
National population estimates are published quarterly and subnational population estimates are published annually.
The estimated resident population is produced using the component methodology and 'date of event' method. The estimates use census data (census usually resident population count) as a starting point. Consequently estimates of the resident population based on one census cover one intercensal period (and slightly beyond) until more recent census data becomes available. When the more recent census data becomes available, this is incorporated into the new base for the next 5-year period. National population estimates are produced quarterly.
To produce population estimates for the current quarter, previous estimates or the base population are updated using births, deaths and external migration data for the current quarter. Birth and death registrations are captured by the Department of Internal Affairs. Statistics New Zealand receives this vitals data each month.
Migration data is not estimated, as all required data is available from Statistics New Zealand's external migration databases.
The formula used for estimating the national resident population is:
Population (current quarter) = population (previous quarter) + births - deaths + net migration (difference between international permanent and long-term arrivals and departures).
Census usually resident population count: a count of all people who usually live in New Zealand and are present in New Zealand on a given census night. This count excludes visitors from overseas, and residents temporarily overseas on census night. The population counts published from the census are not comparable with the estimated resident population.
We produce seasonally adjusted versions of national population by standard broad age bracket.
Provisional and final estimates are produced for the resident population each quarter.
When the more recent census data becomes available, this is incorporated into the new base for the next 5-year period. National population estimates are produced quarterly.