The Ministry of Internal Affairs and Communications said Thursday that it has corrected consumption trend index figures for April-October 2018 following the discovery of a problem with underlying data.
The year-on-year change of the index on price-adjusted real terms was revised up by 0.1 percentage point for households overall in August and by 0.1 to 0.2 point for single-person households in April, May, June and September.
The corrections came after a research firm commissioned by the ministry mistakenly lowered the age of people surveyed by one year since April last year.
The ministry apologized for the problem, saying it will fully check figures in efforts to prevent a recurrence of similar issues.
On the same day the ministry released the index for November 2018, which was delayed due to the problem.
The index for overall households stood at 94.9 against the 2015 base of 100, up 1.3 percent from a year before.
The consumption trend index reflects consumption patterns of singles more strongly than the household spending survey, which mainly covers families with two or more members. The ministry started releasing the data in January last year.
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