In early 2017, Qatar’s total population was 2.6 million, with 313,000 of them Qatari citizens and 2.3 million expatriates. Its official religion is Islam. In terms of income, the country has the fourth-highest GDP (PPP) per capita in the world, and the eleventh-highest GNI per capita (Atlas method). Qatar ranks 42nd in the Human Development Index, the third-highest HDI in the Arab world.