Answer: Suburban areas (or not?)
Explanation: It might seems as a logical choice right? Well, first thing you need to know is that population density and growing is "equitably variable"
Lets say that in town A, our population goes from 10 to 30 in 2 years (agricultural area). But in town B, population goes from 1,000,000 to 30,000,000 in 2 years. The growing it´s EXACTLY THE SAME! No matter the economic situations and ignoring the living conditions. In order to get the exact data of population growth, a statistical studio is required.