The average household size was 2.75 and the average family size was 3.24. The age distribution was 26.1% under 18, 8.2% from 18 to 24, 26.2% from 25 to 44, 26.0% from 45 to 64, and 13.5% who were 65 or older. The median age was 39 years. For every 100 females, there were 100 males. For every 100 females age 18 and over, there were 98 males.  41.3% of the people on Hawaii island are religious, meaning they affiliate with a religion. 18.4% are Catholic; 3.7% are of another Christian faith; 5.1% are LDS; 0.1% in Hawaii, 5.0% are of an eastern faith; 0.1% are Muslim. Executive authority is vested in the mayor of Hawaii County, who is elected for a four-year term. Since 2004, the election by the voters has been on a nonpartisan basis. In 2016, Harry Kim was elected mayor, succeeding Billy Kenoi, who had served a two-term limit. Legislative authority is vested in a nine-member County Council. Members of the County Council are elected on a nonpartisan basis to two-year terms from single-member districts. As of December 2016, Hawaii County Council has a female supermajority for the first time, with six women and three men. Administrative districts were originally based on the traditional land divisions called "Moku" of Ancient Hawaii. Some more heavily populated districts have since been split into North and South districts to make them more comparable on a population basis. The number following each district is the Tax Map Key (TMK) number, used to locate state property information. They are assigned in a counter-clockwise order beginning on the eastern side of the island. County council districts do not directly match the property tax districts because of the variation in the population density of voters in urban areas to rural areas; Hilo & Kailua (Kailua-Kona) towns are densely populated areas, while other districts such as Kaū, Puna, Hāmākua, and North & South Kohala are more sparsely populated. Several government functions are administered at the county level that are at the state or municipal level in other states. For example, the county has its own office of liquor control. Hawaii Department of Public Safety previously operated the Kulani Correctional Facility in Hawaii County, on the Island of Hawaii. In 2009, the Hawaii Department of Public Safety announced that Kulani Correctional Facility would close.