found in Angeles City, which has the largest proportion of Amerasians in the Philippines. Amerasians born in the Philippines have also intermarried with other Amerasian and Filipino natives creating a large number of Amerasian people with less than 50% Amerasian heritages. A 2012 paper by an Angeles, Pampanga, Philippines Amerasian college research study unit suggests that the number of military origin, biracial Filipino Amerasians probably lie between 200,000 and 250,000, and possibly substantially more. The paper maintained that the number of Filipino Amerasians, the progeny of U.S. servicemen, private corporate contractor and government employees stationed over the years in the Philippines, is so significant that mixed-heritage Anglo, African and Latino Amerasians qualify as a genuine human diaspora. It focused on stigmatization, discrimination, psychosocial risks, and mental disorders among a sample of African and Anglo Amerasians residing in Angeles, site of the Clark Air Force Base. The paper asserts that the Angeles-Manila-Olongapo Triangle (AMO) contains the highest concentration of biracial Anglo, African and Latino Amerasians in the world. Today, the Philippines has a large population of Americans and people with American roots, including a significant Amerasian population; there are estimates of 52,000 to 250,000 Amerasians in the Philippines in 1992. These Americans have been joined by a number of Filipino Americans with U.S. citizenship who had immigrated to the United States, then returned to their country of birth. In addition, there is a population of Filipino Americans, who were born in the United States, who are immigrating to the Philippines, known as "baliktad". In 2016, the total number of US citizens living in the Philippines was estimated officially as more than 220,000, with an unofficial source having estimated 600,000 in 2013. Education American international schools in the Philippines include: International School Manila (formerly the "American School") St. Paul American School - Clark Notable people Media See also Afro-Asian Eurasians Foreign Account Tax Compliance Act Philippines–United States relations Philippine nationality law Demographics of the Philippines References American diaspora in Asia American emigration