The Irish community is one of New York City's major and important ethnic groups, and has been a significant proportion of the city's population since the waves of immigration in the late 19th century. As a result of the Great Famine in Ireland, many Irish families were forced to emigrate from the country. By 1854, between 1.5 and 2 million Irish had left their country. In the United States, most Irish became city-dwellers. With little money, many had to settle in the cities that the ships landed in. By 1850, the Irish made up a quarter of the population in Boston, New York, Philadelphia, Buffalo, and Baltimore.