In Kauai there are more older people from the age of 55-64 and from under 5-54 the population is consistent.
In Seattle there is a young population that is booming . There is very few elderly people.
In San Luis Obispo they have a very large you population. I'm assuming the population is college students.
In Tyler Texas the population is consistent through the ages. In the upper ages there are more women.
In Duluth Minnesota there is a high population of 20-24 year olds. And the rest of the population is semi consistent.
The population in Scottsdale has a very large population of 45-74 year olds. Also with a large 25-30 year old population.