The population size of Y deme stood at 7962 until a shift at 6817.0 generations ago, leading to a exponential decrease up to 4355.01 generations and 1117 individuals. Following this, there was an exponential increase to 4047 individuals by 1274.204. Since 1274.204, the population has seen a exponential changed from 4047 to 9673, continuing to the current time.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 7962
        end_time: 6817.0
      - start_size: 7962
        end_size: 1117
        end_time: 4355.01
        size_function: exponential
      - start_size: 1117
        end_time: 1274.204
        end_size: 4047
        size_function: exponential
      - end_time: 0
        start_size: 4047
        end_size: 9673
        size_function: exponential