With an annual growth rate of 2.24%, Nigeria’s population will grow from 145 million in 2010, to an estimated 288 million in 2040.
The HPI measures the extent to which countries deliver long, happy, sustainable lives for the people that live in them. The index is an efficiency measure, it ranks countries on how many long and happy lives they produce per unit of environmental input.
The numbers as at 2010. Gender imbalance may arise as a consequence of various factors including natural factors, exposure to environmental contaminants, war casualties, gender-selective abortions and infanticides, and aging