Suppose that on January 1, 2020, the population of a country is 100 million. During 2020, there are 1 million births and 500,000 deaths. In addition, 2 million people immigrate to the country while 500,000 emigrate. What is the population on January 1, 2021? What is the population growth rate of this country in percent? What proportion of the population growth is the result of natural increase? Show your work and explain.