Continously variable proportional dot maps

https://www.e-education.psu.edu/geog486/book/export/html/1796

Continuously variable proportional dot maps are an effective way to visualize variables or things subject to change. They are often used to portray different populations in certain areas. They display data in relation to the size of the circle. The map shown above is a very old proportional dot map and it is used to show the distribution of different kinds of meat in Paris.