An ecologist is studying a population of Canada geese in the James River Park system to see how the population changes over a number of years. Each year they record the births, deaths, immigration and emigration of the birds. At the start of 2018 there were 50 birds in the population. Over the course of 1 year they recorded the following births, deaths, immigrants, emigrants: Births 24, Deaths 3, Immigrants 19, Emigrants 9 Assuming no additional changes, what is the current size of the population?

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