After World War II, a continuous influx of newcomers from Atlantic Canada and large numbers of immigrants from around the world contributed to the steady growth of Toronto. The large numbers of new Canadians helped Toronto's population swell to over one million by 1951, and double again to over two million, by 1971. The demographics of Toronto changed as a result also, as many immigrants were from countries other than Great Britain. The ethnic diversity grew and saw the development of enclaves such as Little Italy, Little Portugal and two new Chinatowns. In 1967, the first "Caribana" festival was held celebrating the culture of the West Indies.