At the start of the 20th century Motherwell stood a large and growing industrial centre, a town of 37,000 people and a wide variety of heavy industries such as munitions, trams and bridge components. By the 1930s most of Scotland's steel production was in Motherwell, and owned by the Colville family. In 1959 the Colville family were persuaded by the government to begin work of a vast new steel works, which would become Ravenscraig. Within a few years, Ravenscraig was producing more than a million tonnes of steel per year. Following nationalisation of the steel industry, production at the plant was raised, with the Motherwell blast furnaces producing 3 million tonnes each year.