In connection with the publication of Q2 2019, the LFS time series has been revised back to 2008, as LFS has implemented a new enumeration. The new series are of improved quality. From 2016, the opportunity for web answers to the questionnaire was introduced in addition to telephone answering. At the same time, the interview was conducted by another organization in 2016, which resulted in a low response rate. It has not been possible to correct for its effects on all sub-series for this series.