Turkey (Turkish: Türkiye) is a Eurasian country that stretches across the Anatolian peninsula in western Asia and Thrace in the Balkan region of southeastern Europe. Turkey is bordered by eight countries: Bulgaria to the northwest; Greece to the west; Georgia to the northeast; Armenia, Azerbaijan (the exclave of Nakhchivan) and Iran to the east; and Iraq and Syria to the southeast. The Mediterranean Sea and Cyprus are to the south; the Aegean Sea to the west; and the Black Sea is to the north. The Sea of Marmara, the Bosphorus and the Dardanelles (which together form the Turkish Straits) demarcate the boundary between Eastern Thrace and Anatolia; they also separate Europe and Asia. Turkey's location at the crossroads of Europe and Asia makes it a country of significant geostrategic importance. Turkey is one of the six independent Turkic states. The predominant religion by number of people is Islam. The country's official language is Turkish, whereas Kurdish and Zazaki languages are spoken by Kurds and Zazas, who comprise 18% of the population. The CIA World Factbook puts Turkey's population at 77.8 million for the 2010 year.