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In Porirua City, the 'Highest group' income quartile was the largest group in 2018, comprising 28.5% of people aged 15+.
Porirua City's income statistics are an indicator of socio-economic status. With other data sources, such as Household Income, Educational Qualifications and Occupation, they help tell the story of the area's economic opportunities and socio-economic status. Individual income levels are not comparable over time because of the influences of economic change such as wage level fluctuations and inflation. The income quartile method is the most objective method of comparing change in the income profile of a community over time.
A detailed explanation of how Individual Income quartiles are calculated and interpreted is available in specific data notes.
'From all sources of income identified, what will the total income be:
|Individual income quartiles|
|Quartile group||Number||%||Wellington Region %||Number||%||Wellington Region %||2013 to 2018|
|Total persons aged 15+||43,110||100.0||100.0||34,544||100.0||100.0||+8,566|
|Individual income - Quartile group dollar ranges|
|Calculated from income data for New Zealand||Annual income by Census year|
|Individual quartile ranges||2018||2013||2006|
|Lowest group||$0 to $15,211||$0 to $12,825||$0 to $11,398|
|Medium lowest||$15,212 to $31,824||$12,826 to $28,474||$11,399 to $24,402|
|Medium highest||$31,825 to $58,030||$28,475 to $52,637||$24,403 to $42,449|
|Highest group||$58,031 and over||$52,638 and over||$42,450 and over|
Income quartiles allow us to compare relative income-earning capabilities across time. Analysis of the distribution of the population by income quartile in Porirua City compared to Wellington Region shows that there was a lesser proportion of persons in the highest income quartile, and a greater proportion in the lowest income quartile.
The most significant change in Porirua City between 2013 and 2018 was in the Lowest group quartile which showed an increase of 2,272 persons.
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