From the end of World War I until 1962, New Zealand controlled Samoa as a Class C Mandate under trusteeship through the League of Nations, then through the United Nations. There followed a series of New Zealand administrators who were responsible for two major incidents. In the first incident, approximately <answer>one fifth</answer> of the Samoan population died in the influenza epidemic of 1918–1919. Between 1919 and 1962, Samoa was administered by the Department of External Affairs, a government department which had been specially created to oversee New Zealand's Island Territories and Samoa. In 1943, this Department was renamed the Department of Island Territories after a separate Department of External Affairs was created to conduct New Zealand's foreign affairs.
About how much of the total population of Samoa died from influenza during the epidemic?
one fifth