Deme T had an initial size of 3672 until 7508.3 generations ago. At that time, its population size reduced to 1665, and has remained there till current time.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 3672
        end_time: 7508.3
      - start_size: 1665
        end_time: 0