The Italian economy has had very variable growth. In the 1950s and early 1960s, the Italian economy was booming, with record high growth rates, including 6.4% in 1959, 5.8% in 1960, 6.8% in 1961, and 6.1% in 1962. This rapid and sustained growth was due to the ambitions of several Italian businesspeople, the opening of new industries (helped by the discovery of hydrocarbons, made for iron and steel, in the Po valley), re-construction and modernisation of most Italian cities, such as Milan, Rome and Turin, and the aid given to the country after World War II (notably the Marshall Plan).