Case-Fatality Ratio, Population/mi2, Median Household Income, and Unemployment Rate in New York City, New York. A total of 168 zip codes were included. The average CFR was 5.6% and ranged from 1.5% to 6.2%. The population/mi2 ranged from 12,944–128,616, with an average of 43,469. Additionally, the average median household income and unemployment rate was $73,980 (Range: $21,447-$250,000) and 6.2% (Range: 0.4%–15.2%), respectively.