 Native Austrians have had stagnant demographics since World War I, and have been in absolute decline since the 1970s.As of 2011, Statistik Austria official estimates have shown that 81% of residents, or 6.75 million had no migration background and more than 19% or 1.6 million inhabitants had at least one parent of immigrant background.There are more than 415,000 descendants of foreign-born immigrants residing in Austria, the great majority of whom have been naturalized.