The city is governed by a mayor and a four-member city council. Richmond Hill was the location of the discovery in 2004 of Benjaman Kyle, a man who suffers from retrograde amnesia as a result of a severe beating. In 2015, he was identified as William Burgess Powell. Real estate development in Richmond Hill has generally followed trends represented in the United States as a whole. Post-Civil War populations remained relatively stable until the arrival of industrialist Henry Ford in the 1930s. In the early 1970s, subdivisions began to spring up, and began a settlement trend that has continued steadily until the present. Subdivisions of varying quality, ranging from starter homes to exclusive, gated golf communities, have emerged. Locals attribute population growth to the nearest base, Fort Stewart. As of the census of 2000, there were 6,959 people, 2,433 households, and 1,883 families living in the city. The population density was 686.5 people per square mile (265.0/km²). There were 2,573 housing units at an average density of 253.8 per square mile (98.0/km²). The racial makeup of the city was 81.28% White, 13.69% African American, 0.60% Native American, 1.42% Asian, 0.04% Pacific Islander, 1.28% from other races, and 1.68% from two or more races. Hispanic or Latino people of any race were 3.71% of the population. There were 2,433 households out of which 51.0% had children under the age of 18 living with them, 58.7% were married couples living together, 14.7% had a female householder with no husband present, and 22.6% were non-families. 19.2% of all households were made up of individuals and 6.5% had someone living alone who was 65 years of age or older. The average household size was 2.83 and the average family size was 3.24. In the city, the population was spread out with 34.0% under the age of 18, 8.9% from 18 to 24, 36.1% from 25 to 44, 14.2% from 45 to 64, and 6.8% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 93.7 males. For every 100 females age 18 and over, there were 85.5 males.