29.8% had children under the age of 18 living with them, 38.4% were headed by married couples living together, 11.8% had a female householder with no husband present, and 43.8% were non-families. 32.1% of all households were made up of individuals, and 9.7% were someone living alone who was 65 years of age or older. The average household size was 2.43, and the average family size was 3.10. In the city, the 2010 population was spread out, with 22.8% under the age of 18, 12.5% from 18 to 24, 28.2% from 25 to 44, 24.9% from 45 to 64, and 11.7% who were 65 years of age or older. The median age was 34.6 years. For every 100 females, there were 103.4 males. For every 100 females age 18 and over, there were 102.7 males. In 2011 the city's estimated median household income was $44,846, and the median family income was $53,896. Males had a median income of $42,120 versus $31,362 for females. The city's per capita income was $25,041. About 9.6% of families and 14.4% of the population were below the poverty line, including 15.1% of those under age 18 and 12.8% of those age 65 or over. The population was 180,480 at the 2000 census; in 2010, its population had risen to 225,221, making it the third-largest city in the state after Las Vegas and Henderson, and the largest outside Clark County. Reno lies north of the Nevada state capital, Carson City, and northeast of Lake Tahoe in a shrub-steppe environment. Reno shares its eastern border with the city of Sparks and is the larger of the principal cities of the Reno–Sparks, Nevada Metropolitan Statistical Area (MSA), a metropolitan area that covers Storey and Washoe counties. The MSA had a combined population of 425,417 at the 2010 census. The MSA is combined with the Fernley Micropolitan Statistical Area and the Carson City MSA to form the Reno-Carson City-Fernley Combined Statistical Area, which had a population of 477,397 at the 2010 census. Economy Until the 1960s, Reno was the gambling capital of the United States, but Las Vegas' rapid growth, American Airlines' 2000 buyout of Reno Air, and the growth of Native American gaming in California have reduced its gambling economy. Older casinos were torn down (Mapes Hotel, Fitzgerald's Nevada Club, Primadonna, Horseshoe Club, Harold's Club, Palace Club), or smaller casinos like the Comstock, Sundowner, Golden Phoenix, Kings Inn,