Kaliningrad Oblast (Russian: Калинингра́дская о́бласть, Kaliningradskaya oblast) is a federal subject of the Russian Federation that is located on the coast of the Baltic Sea. As an oblast, its constitutional status is equal to each of the other 84 federal subjects. Its administrative center is the city of Kaliningrad, formerly known as Königsberg. It is the only Baltic port in the Russian Federation that remains ice-free in winter. According to the 2010 census, it had a population of 941,873. The oblast is an exclave so visa-free travel to the main part of Russia is only possible by sea or air. The territory was formerly part of East Prussia. With the defeat of Nazi Germany in 1945, the territory was annexed by the Soviet Union. Following the post-war migration and expulsion of the German-speaking population, the territory was populated with citizens from the Soviet Union. Today, only a few thousand ethnic Germans remain, most of them recent immigrants from other parts of the former Soviet Union. Early in the 21st century, the hitherto flagging economy of Kaliningrad Oblast became one of the best performing economies in Russia. This was helped by a low manufacturing tax rate related to its "Special Economic Zone" (SEZ) status. As of 2006, one in three televisions manufactured in Russia came from Kaliningrad. The territory's population was one of the few in Russia that was expected to show strong growth after the collapse of the USSR. Following World War II, the status of Kaliningrad Oblast under international law did note that Königsberg (Kaliningrad) was not formally transferred to the Soviet Union after 1945, the territory was merely placed under Soviet administration. Germany currently places no claims, however it also has not renounced any claims to the possibility of territory reunification.