Working age people account for nearly 80% of the population. Compared to 2004, residents age 0–14 as a proportion of the population dropped from 9.96% to 9.5% in 2013 and residents over the age of 65 declined from 11.12% to 9.2%. From 2000 to 2010, the percentage of city residents with at least some college education nearly doubled from 16.8% to 31.5%. About 22.2% have some high school education and 31% had reached middle school.