Chained values do not show additivity. By chained values you cannot find totals by simple addition of components. You need to use a specific formula as described here - https://www.dst.dk/ext/national/NR-DOK. Chained values do not show additivity. By chained values you cannot find totals by simple addition of components. You need to use a specific formula as described here - https://www.dst.dk/ext/national/NR-DOK. On February 28 2023 the data on hours worked was revised back to 2008q1. Only quarterly data is affected, the annual total was not affected.