furniture, shoes, cement, plastic goods, textiles and cigarettes. Tourism and services Rwanda's service sector suffered during the late-2000s recession as banks reduced lending and foreign aid projects and investment were reduced. The sector rebounded in 2010, becoming the country's largest sector by economic output and contributing 43.6% of the country's GDP. Key tertiary contributors include banking and finance, wholesale and retail trade, hotels and restaurants, transport, storage, communication, insurance, real estate, business services and public administration including education and health. Tourism is one of the fastest-growing economic resources and became the country's leading foreign exchange earner in 2011. In spite of the genocide's legacy, the country is increasingly perceived internationally as a safe destination; The Directorate of Immigration and Emigration recorded 405,801 people visiting the country between January and June 2011; 16% of these arrived from outside Africa. Revenue from tourism was US$115,600,000 between January and June 2011; holidaymakers contributed 43% of this revenue, despite being only 9% of the numbers. Rwanda is one of only two countries in which mountain gorillas can be visited safely; gorilla tracking in the Volcanoes National Park attracts thousands of visitors per year, who are prepared to pay high prices for permits. Other attractions include: Nyungwe Forest, home to chimpanzees, Ruwenzori colobus and other primates, the resorts of Lake Kivu, and Akagera, a small savanna reserve in the east of the country. Rwanda's tourism is centred on the attractions of Volcanoes National Park (PNV) with its six volcanoes and the protected population of mountain gorillas made famous by Dian Fossey. Additionally, tourism is drawn to central Africa's largest protected wetland Akagera National Park, with its populations of hippopotami, cape buffalo, zebras, elephants, elands, and other big game animals. Birdwatching-related tourism has a potential to develop as well, especially in Nyungwe National Park, among the largest uncut forest reserves in Africa. Nyungwe National Park is home to over 300 species of birds. And a vast variety of wild life as well. Several memorial sites associated with the Rwandan genocide have begun to generate significant dark tourism. For example, the Gisozi Genocide Memorial Site in the Gasabo District of Kigali—the burial place of approximately 300,000 victims of the genocide—has a related genocide exhibition area and library and has plans to develop a teaching centre on the history of the genocide. Another major genocide-related memorial centre attracting tourists is the Murambi Genocide Memorial Site housed in the