A developed country, the economy of Greece mainly revolves around the service sector (85.0%) and industry (12.0%), while agriculture makes up 3.0% of the national economic output.[8] Important Greek industries include tourism (with 14.9 million[32] international tourists in 2009, it is ranked as the 7th most visited country in the European Union[32] and 16th in the world[32] by the United Nations World Tourism Organization) and merchant shipping (at 16.1%[33] of the world's total capacity, the Greek merchant marine is the largest in the world[33]), while the country is also a considerable agricultural producer (including fisheries) within the union. With an economy larger than all the Balkan economies combined, Greece is the largest economy in the Balkans,[34][35] and an important regional investor.[34][35] Greece is the number-two foreign investor of capital in Albania, the number-three foreign investor in Bulgaria, at the top-three foreign investors in Romania and Serbia and the most important trading partner and largest foreign investor of the Republic of Macedonia. Greek banks open a new branch somewhere in the Balkans on an almost weekly basis.[36][37][38] The Greek telecommunications company OTE has become a strong investor in Yugoslavia and other Balkan countries.[36]