Demographics of Turkey of Congress, there is a whole chapter about Kurds in Turkey where it is stated that "Turkey's censuses do not list Kurds as a separate ethnic group. Consequently, there are no reliable data on their total numbers. In 1995 estimates of the number of Kurds in Turkey is about 8.5 million" out of 61.2 million, or 13% of the population at that time. Turkish government statistics show that Kurdish women in Turkey give birth to about four children, more than double the rate for the rest of the Turkish population. Prime Minister Erdogan stated that Kurds could become a majority
Population exchange between Greece and Turkey a legitimizing factor or a "safe criterion" in marking ethnic groups as Turkish or as Greek in the population exchange. As a result, the Greek-Turkish population exchange did exchange the Greek-Orthodox population of Anatolia, Turkey and the Muslim population of Greece. However, due to the heterogeneous nature of these former Ottoman lands, many other ethnic groups posed social and legal challenges to the terms of the agreement for years after its signing. Among these were the Protestant and Catholic Greeks, the Arabs, Albanians, Russians, Serbians, Romanians of the Greek Orthodox religion; the Albanian, Bulgarian, Greek Muslims of Macedonia and Epirus,