How many voters per electoral college delegate

The New York Times had an interesting cartogram illustrating the number of voters represented by each delegate to the electoral college.
In this cartogram, the larger sized states indicate fewer voters per delegate; meaning that each voter has "more" influence over the result. The article discusses how each voter represents a multitude of people- those that don't vote, those under 18, noncitizens and prisoners and felons. Interesting read.