Birth rate
The region of Sub-Saharan Africa has the highest birth rate in the world. As of 2016, Niger, Mali, Uganda, Zambia, and Burundi have the highest birth rates in the world. This is part of the fertility-income paradox, as these countries are very poor, and it may seem counter-intuitive for families there to have so many children. The inverse relationship between income and fertility has been termed a "demographic-economic "paradox"" by the notion that greater means would enable the production of more offspring as suggested by the influential Thomas Malthus.
Nicaragua
Nicaragua has a population growth rate of 1.5% . This is the result of one of the highest birth rates in the Western Hemisphere: 17.7 per 1,000 as of 2017. The death rate was 4.7 per 1,000 during the same period according to the United Nations.