demographer William H. Frey, using data from the 2010 United States Census, Las Vegas has the second lowest level of black-white segregation of any of the 100 largest metropolitan areas in the United States, after Tucson, Arizona. Hawaiians and Las Vegans alike sometimes refer to Las Vegas as the "ninth island of Hawaii" because so many Hawaiians have moved to the city. There is an Ethiopian community in Las Vegas. The 2010 census showed the city contained 583,756 people, 211,689 households, and 117,538 families residing. The population density was . There were 190,724 housing units at an average density of . As of 2006, there were 176,750 households, of which 31.9% had children under age 18 living with them, 48.3% were married couples living together, 12.2% had a female householder with no husband present, and 33.5% were non-families. 25.0% of all households were made up of individuals, and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.20. In the city, the population age distribution was as follows: 25.9% under the age of 18 8.8% from 18 to 24 32.0% from 25 to 44 21.7% from 45 to 64 11.6% who were 65 years of age or older The median age was 34 years. For every 100 females, there were 103.3 males. For every 100 females age 18 and over, there were 102.5 males. The median income for a household in the city was $53,000 and the median income for a family was $58,465. Males had a median income of $35,511 versus $27,554 for females. The per capita income for the city was $22,060. About 6.6% of families and 8.9% of the population were below the poverty line, including 5.4% of those under age 18 and 6.3% of those age 65 or over. According to a 2004 study, Las Vegas has one of the highest divorce rates. The city's high divorce rate is not wholly due to Las Vegans themselves getting divorced. Since divorce is easier in Nevada than in most other states, many people come from across the country for the easier process. Similarly, Nevada marriages are notoriously easy to get. Las Vegas has one of the highest marriage rates of U.S. cities, with many licenses issued to people from outside the area (see Las Vegas weddings). Economy The primary drivers of the