New York metropolitan area eight subregions are often further divided. For instance, Long Island can be divided into its South and North Shores (usually when speaking about Nassau County and western Suffolk County) and the East End. The Hudson Valley and Connecticut are sometimes grouped together and referred to as the Northern Suburbs, largely because of the shared usage of the Metro-North Railroad system. The geographical, cultural, and economic center of the metropolitan area is New York City, which consists of five boroughs, each of which is also a county of New York State. The five boroughs – Brooklyn, Queens, Manhattan, the Bronx, and
Caribbean immigration to New York City community as "Loisaida"), Spanish Harlem and Williamsburg, Brooklyn since the 1950s. There are large Puerto Rican populations throughout the 5 boroughs, with the Bronx having the largest. Currently, Bushwick and several South Bronx neighborhoods, such as Soundview, have some of the largest numbers of Puerto Ricans in the city. However, there has been an increase in Puerto Ricans in outlying areas of the city, such as the North Shore of Staten Island, and the eastern Bronx. Caribbean immigration to New York City Caribbean immigration to New York City has been prevalent since the early 1900s. This immigration wave saw large