Top Artists: Billboard. Median incomes and population density: U.S. Census. Definition of rural, suburban and urban by population density: U.S. Department of Defense. Ages and hometowns: Wikipedia. For bands with more than one member, the lead singer was used.

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Hit songs are songs that topped the US Billboard Weekly Hot 100.
First names in song titles that made no appearance in lists of the
top 200 baby names 1910-present were omitted.
Sorry Amadeus, Davy, Delilah, Dolly, Duke, Elmo, Jude, Juliet, Kyrie,
Louie, Mack, Mickey, Peg, Ringo, Romeo, Sharona, Stagger, Venus, Windy & Woody.