For NRY (paternal) haplogroups among black Bermudians, the study found about a third were made up of three African ones (of which E1b1a, the most common NRY haplogroup in West and Central African populations, "accounted for the vast majority of the African NRY samples (83%)" ), with the remainder (about 64.79%) being West Eurasian excepting one individual (1.88%) with a Native American NRY haplogroup Q1a3a. Of the individuals with European NRY haplogroups, more than half had R1b1b2, which is common in Europe and is found at frequencies over 75% in England and Wales. None of these percentages can be taken as equivalent to the percentage of ancestry in the black population from the specific regions as genetic drift tends to erase minority haplogroups over generations. This explains the near absence of Native American haplogroups despite the hundreds of Native Americans known to have been involuntarily brought to Bermuda in the seventeenth century.