The World Bank has published the 2017 edition of its dataset: "Population Estimates and Projections." This database presents population and other demographic estimates and projections for the period 1960 to 2050. The data are disaggregated by age-group and gender and cover approximately 200 economies. The data also include information about fertility, mortality, and population by age.
According to World Bank, estimated fertility rate will fall by approximately 11 percent, from 2,45 in 2015 birth per women to 2,21 in 2050. In contrast, European countries fertility rate is expected to grow slightly. African countries have the highest fertility rates globally. They will keep their leadership among countries by fertility rate. What about the crude birth rate, this indicator has the same trends.