Back when I was doing grants, I had the US Census for a reservation for 1970, 1980, and 1990. I remember that the total population had not gone up by much (may

Back when I was doing grants, I had the US Census for a reservation for 1970, 1980, and 1990. I remember that the total population had not gone up by much (maybe 8,000 to 8,200), but on each census 50% of the population was under 18. That scared me deeply. Doubling would have been happier.