 Studies have shown that the racial ancestry mixture of the average Puerto Rican (regardless of racial self-identity) is about 56% European/North African (Canary Islander Guanche), 28% Sub-Saharan African, and 16% Native Taino, with European ancestry strongest on the west side of the island and West African ancestry strongest on the east side, and consistent levels of Taino ancestry throughout the island.Even though over 75% of the population of Puerto Rico self identifies as white, only about 25% are purely (or close to pure) of European/North African ancestry.About 45-50% of Puerto Ricans have high amounts of black West African ancestry, but majority are mixed race and self identify as white, the opposite of the US One drop rule, a legacy the Regla de Sacar law in colonial Puerto Rico.