The population of the country almost doubled during the twentieth century, but the pattern of growth was extremely uneven due to large-scale internal migration from the rural South to the industrial cities of the North, a phenomenon which happened as a consequence of the Italian economic miracle of the 1950–1960s. In addition, after centuries of net emigration, from the 1980s Italy has experienced large-scale immigration for the first time in modern history. According to the Italian government, there were an estimated 5,234,000 foreign nationals resident in Italy on 1 January 2019.