Frequently asked questions - population statistics

Population statistics produced by Statistics New Zealand include census counts, population estimates and population projections. 'Frequently asked questions' provides information on commonly asked questions about population and population statistics.

Due to the number of questions, the information is contained on two pages: 

Part 1 provides information on the following questions:

• What is the difference between census counts, population estimates and projections?
• What geographic levels are available?
• When are the different population statistics available?
• How many people does the census miss?
• What basic components underlie the population estimates?
• What basic assumptions underlie the population projections?
• What use are population statistics?
• Which projection series should I use?
• What is meant by 'the demographic transition' and 'population ageing'?
• What is meant by 'sub-replacement fertility'?

and

Part 2 provides information on the following questions:

• How can Statistics New Zealand know more about our local area than people who live there?
• Why can population estimates/projections contradict trends in housing numbers?
• How do population trends relate to trends in other indicators?
• What is the relationship between population change and economic growth?
• Are visitors to an area included in the population estimates/projections?
• How do you decide if someone usually lives in an area?
• How credible are population estimates?
• How accurate are demographic projections?
• What is the difference between a projection and a prediction?
• Why are prioritised ethnic data not recommended?
• Are customised projections available?