Human capital formation adds to a country's productive power by developing its existing human resources through education and health. This is seen through higher incomes earned from increased productivity. The quality of a population, determined by factors like literacy rates and life expectancy, ultimately decides a country's growth rate. Educated and healthy people are assets to an economy, while illiterate and unhealthy populations are liabilities. Improving population health and expanding access to healthcare has been a priority aim of national policy.