You can roughly approximate the doubling time for a given percentage by dividing 70 cycles (years in case of annual growth) by the percentage. So 1% annual growth doubles the population every 70 years. 2% every 35 years. So pick whatever percentage you think is a realistic growth rate.
You can roughly approximate the doubling time for a given percentage by dividing 70 cycles (years in case of annual growth) by the percentage. So 1% annual growth doubles the population every 70 years. 2% every 35 years. So pick whatever percentage you think is a realistic growth rate.