Derived from the Census question:
'From all sources of income identified, what will the total income be that you got yourself, before tax or anything was taken out of it, in the 12 months that will end on 31 March 2013?'
Individual income quartiles
Individual income groups are not comparable over time because of the influences of economic change such as wage level fluctuations and inflation. Income quartiles have been adopted as the most objective method of comparing change in the income profile of a community over time. Because the quartile method derives 4 equal groups from income ranges collected by Stats New Zealand, the exact 25%, 50% and 75% cutoffs rarely fall exactly on the end of a collection range. Where they cross a range, the approximate point in the range where the cutoff would fall is estimated automatically. An inherent assumption with this method is that the income $ values within the range are uniformly distributed through the range. While this is unlikely to be the case, in the absence of other information, it is the only reasonable assumption, and when calculated for large populations (e.g. The whole of New Zealand), is a close enough approximation of reality to provide meaningful results. Quartile ranges are calculated from New Zealand total population individual income data.
The data presented is for the population aged over 15.
|Individual income quartiles|
|Te Waipounamu - Rohe||2013||2006||Change|
|Quartile group||Number of Māori within rohe||% of Māori within rohe||New Zealand Māori population %||Number of Māori within rohe||% of Māori within rohe||New Zealand Māori population %||2006 to 2013|
|Total aged 15+||55,005||100.0||100.0||48,540||100.0||100.0||+6,465|
Source: Statistics New Zealand, Census of Population and Dwellings (opens a new window) 2006 and 2013.
|Quartile group dollar ranges (Individuals)|
|Calculated from income data for New Zealand total population||Annual income by Census year|
|Individual quartile ranges||2013||2006|
|Lowest group||$0 to $12,825||$0 to $11,398||30000|
|Medium lowest||$12,826 to $28,474||$11,399 to $24,402||30000|
|Medium highest||$28,475 to $52,637||$24,403 to $42,449||30000|
|Highest group||$52,638 and over||$42,450 and over||30000|
Source: Statistics New Zealand, Census of Population and Dwellings (opens a new window) 2013.
The major differences between the individual income quartiles of the Māori population in Te Waipounamu Rohe and the New Zealand Māori population were:
- A larger percentage in the Medium highest quartile (27.3% compared to 25.2%)
- A larger percentage in the Highest group quartile (19.7% compared to 18.2%)
- A smaller percentage in the Lowest group quartile (28.4% compared to 30.9%)
- A smaller percentage in the Medium lowest quartile (24.5% compared to 25.7%)
The largest changes in the individual income quartiles of the Māori population in Te Waipounamu Rohe between 2006 and 2013 were:
- Highest group (+2,525 people)
- Lowest group (+1,970 people)
- Medium highest (+1,337 people)
- Medium lowest (+633 people)