Eurostat, Luxembourg. Construction - quarterly data - index (2015 = 100) (NACE Rev. 2): Unit of measure: Index, 2021=100 / Seasonal adjustment: Unadjusted data (i.e. neither seasonally adjusted nor calendar adjusted data) / Indicator: Hours worked index / Statistical classification of economic activities in the European Community (NACE Rev. 2): Construction / Geopolitical entity (reporting): Belgium.