A refugee is a person who is outside his or her country of origin or habitual residence because they have suffered (or fear) persecution on account of race, religion, nationality, political opinion, or because they are a member of a persecuted 'social group' or because they are fleeing a war. Such a person may be called an 'asylum seeker' until recognized by the state where they make a claim. Although similar and frequently confused with refugees, internally displaced persons have a different legal definition and are essentially refugees who have not crossed any international border. At the end of 2012 the United Nations Refugee Agency (UNHCR) reported that there were 15.4 million refugees worldwide. By contrast there were 28.8 million (about twice as many) IDPs at the end of 2012 In 2012 Afghanistan was the biggest source country of refugees (a position it has held for 32 years) with one out of every four refugees in the world being an Afghan and 95% of them living in Pakistan and Iran.