Funding for this research was provided by:
Statistics Norway
Article History
Received: 21 April 2020
Accepted: 29 April 2021
First Online: 18 May 2021
Change Date: 18 October 2021
Change Type: Update
Change Details: In the published article, the funding note “Open access funding provided by Statistics Norway” was missed. The article has been updated.
Declarations
:
: Helliesen declares that he has no conflict of interest. Hungnes declares that he has no conflict of interest. Skjerpen declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.