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Are they married, in a relationship or single? And do they have children?
Where do they live? How long have they lived there? Do they own the dwelling, or rent? Does the house have more than two bedrooms? What type of heating?
Where were they born? Which ethnic affiliation do they maintain? Which languages do they speak? Do they adhere to a religion?
What did they study? In what field do they work? For how many hours each week? Do they own a business? What other forms of income do they have? How do they travel? How many motor vehicles do they own?
So many questions - and so many New Zealanders who have not provided the answers.
The announcement last week that no fewer than 700,000 people had either not participated in or not completed the 2018 census confirms it as a failure of epic proportions.
Long delays in the release of information rang alarm bells, but that one in seven New Zealanders have not had their information recorded is truly disheartening.
March 6 last year was supposed to herald a bright new start to the gathering of vital information about this country.
Gone was the old way - the supposedly inefficient process of knocking on doors and handling paper forms - and in was the new, the move to a digital-first approach with the use of a pen seen as very much a secondary option.
Stats NZ certainly meant well. Going online has its benefits, both economic and practical, and many people doubtless found completing the census on their computers or mobile devices a doddle.
Sadly, those who feared an all-in approach to digital, without some sort of trial, was fraught with danger were right.
In very broad terms, for every six people who had no problem filling out the census online, one failed. A digital-first approach proved nowhere near as effective as the old method.
"Access codes", general online processes, having to phone to request a paper copy of the form - these were clearly all barriers to lots of people, perhaps affecting the older population, Maori and minorities the most.
This matters because it means the census is going to deliver skewed and incomplete results. The census, held every five years, provides vital information - a snapshot of the nation - that is used primarily for allocating funding for core services, for future planning, for the drawing of electoral boundaries, for so many things. It must be done, and it must be done right.
More information has been promised from Stats NZ, but it seems the only option is to try again, possibly as soon as 2021, to avoid a clash with the election.
Online might be the future for the census, and there seems little point in a return to a paper-only process, but we must be better prepared for the next time we take the pulse of the nation.