Despite continuing concerns about Austin's affordability, more than a third of the city's residents live alone—a number that tops the national average. According to the 2016 American Community Survey, which is conducted by the U.S. Census Bureau, more than 34 percent of Austinites live by themselves. Nationally, just under 28 percent of Americans live alone. The other demographic options include couples with no children (nearly 20 percent), couples with children (17.1 percent), adults who live with non-relatives (13.84 percent), single adults with children (8.11 percent) and adults who live with relatives (6.75 percent). The same survey also shows that the most populous age group in the city is 25-34, which includes nearly 200,000 Austin residents. It easily eclipses the next most populous age group, 35-44, by more than 50,000 people. The median age in Texas, 34.2, is nearly two years older than the median age in Austin, which is 32.4.