Demographics of Turkey are available for the Kurdish population, because the Turkish government has outlawed ethnic or racial censuses. An estimate by the CIA World Factbook places their proportion of the population at approximately 18%. Another estimate, according to Ibrahim Sirkeci, an ethnic Turk, in his book "The Environment of Insecurity in Turkey and the Emigration of Turkish Kurds to Germany", based on the 1990 Turkish Census and 1993 Turkish Demographic Health Survey, is 17.8%. Other estimates include 15.7% of the population according to the newspaper "Milliyet", and 23% by Kurdologist David McDowall. The Minority Rights Group report of 1985 (by Martin Short
Population exchange between Greece and Turkey Pomaks, Cham Albanians, Megleno-Romanians, and Dönmeh. The Turks and other Muslims of Western Thrace were exempted from this transfer as were the Greeks of Constantinople (Istanbul) and the Aegean Islands of Imbros (Gökçeada) and Tenedos (Bozcaada). In the event, those Greeks who had temporarily fled these regions, particularly Istanbul, before the entrance of the Turkish army were not permitted to return to their homes by Turkey afterwards. Greece, with a population of just over 5,000,000 people, had to absorb 1,221,489 new citizens from Turkey. The punitive measures carried out by the Republic of Turkey, such as the 1932 parliamentary law