Yet , in a 2006 survey from the " Instituto Nacional de Estadística e Informática " ( INEI ) , the Peruvian population self-identified primarily as mestizo ( 59.5 %) , followed by Quechua ( 22.7 %) , Aymara ( 2.7 %) , Amazonian ( 1.8 %) , Black / Mulatto ( 1.6 %) , white ( 4.9 %) , and " Others " ( 6.7 %) .