New York African Burial Ground Skeletal Biology Final Report, Volume 1. Chapter 13. The Political Economy of Forced Migration: Sex Ratios, Mortality, Population, Growth and Fertility among Africans in Colonial New York

The number of Africans imported into the New York colony between 1700 and
the eve of the Revolutionary War has been estimated to range between 6,800 and 7,400. The higher estimates are based on under counting of captives due to smuggling from New Jersey, and possibly other states, to avoid tariffs. According to Lydon (1978:382-383), the minimum estimate, based on extant records for the eighteenth century, includes approximately 2,800 people or 41 percent brought directly from Africa and 4,000 from the Caribbean (and less significantly the southern colonies).