One nation under God, mapped

[Lordquinton]

2. Aside from really weird religious groupings

"So it's not the case that atheists are a plurality in many American states, but these numbers do suggest that a large and growing segment of the population is dissatisfied with organized religion, either due to non-belief or because they choose to express their faith outside of formal religious institutions."

Unaffiliated means more that they didn't fit into the groups they set out, and less non-believers.