Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Demographics of Sarajevo Sarajevo Canton government. All figures after 1945 represent the greater Sarajevo area. According to the official government statistics, Sarajevo's population density is 2470.1 per square kilometer. The most densely populated part of Sarajevo is in the municipality Novo Sarajevo (7524.5 inhabitants per square kilometer), while the least densely populated is the Stari Grad municipality (742.5 inhabitants per square kilometer). Regarding the age structure of Sarajevo, the overwhelming majority of people are between 15 and 64 years of age. This group consists of 208,703 people, or a little over 70% of the total city population. When it comes to people 14