Originally composed solely of the indigenous Māori, the ethnic makeup of the population has been dominated since the 19th century by New Zealanders of European descent, mainly of Scottish, English, Welsh and Irish ancestry, with smaller percentages of other European and Western Asian ancestries such as Greek, Turkish, Italian, Lebanese and other Arab, German, Dutch, Scandinavian and South Slavic, with Western European groups predominating. Today, the ethnic makeup of the New Zealand population is undergoing a process of change, with new waves of immigration, higher birth rates and increasing interracial marriage resulting in the New Zealand population of Māori, Asian, Pacific Islander and multiracial descent growing at a higher rate than those of solely European descent, with such groups projected to make up a larger proportion of the population in the future. New Zealand has an estimated resident population of around Over one million New Zealanders recorded in the 2013 New Zealand census were born overseas.