MikeB4:Comparing Aotearoa to the likes of Denmark is not a fair comparison. Population is only one metric there are many more that need to be compared. Any comparisons must take into account, Incomes, income spread, population density and spread, ethnic spread, transport both internally and import, utilities, tax, dietary requirements and many many more.
Ireland might be a closer-to-NZ demographic country to compare against.
They have 11 supermarket chains.