A population of 2,000 birds has an annual per capita birth rate of 14/100, an annual per capita death rate of 9/100, and an emigration rate of 2/100. What was the per capita rate of increase, including emigration, for this year? Equation for population growth. Change in population size divided by change in time equals birth rate minus death rate. A population of 2,000 birds has an annual per capita birth rate of 14/100, an annual per capita death rate of 9/100, and an emigration rate of 2/100. What was the per capita rate of increase, including emigration, for this year? Equation for population growth. Change in population size divided by change in time equals birth rate minus death rate. 0.06 14 60 0.03