demographic transition model stages

1\.

high birth and death rates, low natural rate of increase, pre-industrial with no mechanized agriculture

2

high birth rate, rapidly declining death rate, high natural rate of increase, more advancements of eds and meds

3

birth rate is declining faster than death rate, growing economy, eds and meds improve

4

low birth, low death, no longer enough young people replacing the old, population stabilized because its sustainable

5

low birth and death rates, eventual increase in death rates