Deme T maintained a population of 7970 until there was a shift 1728.0 generations ago that reduced its numbers to 7118, a figure that has remained the same since.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 7970
        end_time: 1728.0
      - start_size: 7118
        end_time: 0