Employment by economic activity is based on national account standards and is produced by integrating information from many sources, such as labour force survey (LFS), the Icelandic survey on wages, earnings and labour costs (ISWEL) along with register data from tax returns and current income. Productivity is about increased output with the same or less input. Labour productivity is calculated for the period 2008 – 2016 based on Gross domestic product by industries and total employment measured by hours worked.