This is a list of all the countries by the Human Development Index as included in a United Nations Development Programme’s Human Development Report. The latest report was released on 14 December 2015 and compiled on the basis of estimates for 2014. The Human Development Index (HDI) is a composite statistic of life expectancy, education, and income per capita indicators. A country scores higher HDI when the life expectancy at birth is longer, the education period is longer, and the income per capita is higher. It is used to distinguish whether the country is a developed, a developing or an underdeveloped country. Countries fall into four broad human development categories: Very High Human Development, High Human Development, Medium Human Development and Low Human Development. The first 25 countries in this ranking are shown in the table below.