The history of immigration to the United States details the movement of people to the United States, from the colonial era to the present. The United States experienced successive waves of immigration, particularly from Europe, and later from Asia and Latin America. Colonial era immigrants often repaid the cost of transoceanic transportation by becoming indentured servants where the new employer paid the ship's captain. Starting in the late 19th century, immigration was restricted from China and Japan. In the 1920s, restrictive immigration quotas were imposed, although political refugees had special status. Numerical restrictions ended in 1965. In recent years, the largest numbers have come from Asia and Central America.