Kingdom of Sweden (Swedish: Konungariket Sverige ), is a Scandinavian country in Northern Europe. Sweden borders Norway and Finland, and is connected to Denmark by a bridge-tunnel across the Øresund. At 450,295 square kilometres (173,860 sq mi), Sweden is the third largest country in the European Union by area, with a total population of about 9.5 million. Sweden has a low population density of 21 inhabitants per square kilometre (54 /sq mi) with the population mostly concentrated to the southern half of the country. About 85% of the population live in urban areas.Sweden's capital city is Stockholm, which is also the largest city. Since the early 19th century Sweden has been at peace and has avoided war. Today, Sweden is a constitutional monarchy with a parliamentary democracy form of government and a highly developed economy. Sweden has the world's eighth highest per capita income. In 2011, it ranked fourth in the world in The Economist's Democracy Index, 7th in the 2013 United Nations' Human Development Index (third on the inequality-adjusted HDI) and third on the 2012 Legatum Prosperity Index.