From the reference year 2025 onwards, a small controlled random uncertainty is introduced in all reported data. The uncertainty has been added to protect individuals so that no one risks being exposed in the statistics. As a result, the reported totals are not always equal to the sum of their reported components.


If reported statistical values are added together to create a new total, the uncertainty is also added. There is therefore a risk that the new total contains greater uncertainty than that which – under the method – would have been added to a single value.


The method used for disclosure control is called Cell Key Method (CKM). You can read more about the method here: [Protection methods for disclosure control](https://www.scb.se/en/documentation/statististical-methods/protection-methods-for-disclosure-control/) and here: [Development of disclosure protection](https://www.scb.se/en/documentation/statistical-areas-under-change/development-of-disclosure-protection/). Values based on five or fewer persons or households are shown as .. (two dots) for reference years up to 2024. The model to estimate register-based household statistics changed in 2016. The statistics for the years 2011–2015 were also revised. A household consists of the persons who are registred at the same dwelling. For people with no link to their dwelling (No information), household cannot be created.

type of household

In households with children the youngest child is younger than 25 years. There might also be older children in the household.

type of housing

One- or two-dwelling buildings means detached one- and two-dwelling buildings as well as semi-detached, row and linked buildings (excluding buildings for seasonal and secondary use).
Multi-dwelling buildings means buildings with three or more apartments including balcony access housing.

The apartments´ type of tenure is based on the ownership and not how the residents possesses the apartments.

One- or two-dwelling buildings with rented dwellings means apartments owned by other than private persons, estates of deceased persons or housing cooperatives. Multi-dwelling and other buildings with rented dwelling means dwellings that are not condominiums and owned by other than housing cooperatives.

One- or two-dwelling buildings with tenant-owned dwellings means apartments owned by housing cooperatives. Multi-dwelling and other buildings with tenant-owned dwelling means apartments owned by housing cooperatives.

One- or two-dwelling buildings with owner-occupied dwellings means apartments owned by private persons or estates of deceased persons. Multi-dwelling and other buildings with owner-occupied dwelling means condominiums.

type of housing

Other housing means buildings that are not intended for residential purposes but still contains ordinary dwellings, e.g. buildings used for business or public function, and owner-occupied dwellings in multi-dwelling buildings. It also includes dwellings where information on form of tenancy is missing.