Supply and use tables and the input-output tables based on them describe in detail product flows in the national economy. They are suited for analysing production activity structures and interdependencies between industries. The tables add detail to national accounts and form a coherent framework for describing product flows in the accounts. As the tables are compiled as an integral part of national accounts they also improve the quality of other national accounts data. Supply and use tables describe the supply of products formed by domestic production and imports, and the use of these products as intermediate products in the production of other products and as final products for consumption, capital formation and exports. The actual, symmetrical input-output tables provide a picture of interdependencies between industries, while analysis tables derived from them indicate the importance of the production and final use of different industries to the production and employment in the whole economy.