I have only recently started playing Fallout: Shelter, and so far I have 15 dwellers in my vault. I have a fairly good constant supply of power, food and water and the overall average happiness across my vault is 93%.
However, things just seem really slow considering that I haven't been getting many new dwellers in a while. Usually, I seem to be getting only about one or two per day.
Is this a fixed amount no matter what, or are there any ways of getting new dwellers quicker?