They don’t contribute, as they are all below replacement rate. https://www.newgeography.com/content/007550-total-fertility-rate-metros-san-francisco-lowest-jac

They don’t contribute, as they are all below replacement rate. https://www.newgeography.com/content/007550-total-fertility-rate-metros-san-francisco-lowest-jacksonville-highest https://www.newgeography.com/content/007550-total-fertility-... Probably true worldwide except maybe Africa and Middle East.