The upheavals and ethnic cleansing of the 20th century vastly changed Crimea's ethnic situation. In 1944, 200,000 Crimean Tatars were deported from Crimea to Central Asia and Siberia, along with 70,000 Greeks and 14,000 Bulgarians and other nationalities. By the latter 20th century, Russians and Ukrainians made up almost the entire population. However, with the fall of the Soviet Union, exiled Crimean Tatars began returning to their homeland and accounted for 10% of the population by the beginning of the 21st century.