Population data typically comes in the context of boundaries. City data. County data. Country data. With their Population Estimate Service, NASA provides data at higher granularity. You can request estimated population in the context of a world grid.
World population estimator and gridded data from NASA
Projects by FlowingData See All →
People get married at various ages, but there are definite trends that vary across demographic groups. What do these trends look like?
Who Earns More Income in American Households?
Compared to 1970, a shift towards women making the higher income.