In July 2013, International Enterprise Singapore opened its 38th global office in Accra, to develop trade and investment on logistics, oil and gas, aviation, transportation and consumer sectors. Singapore and Ghana also signed four bilateral agreements to promote public sector and private sector collaboration, as Ghana aims to predominantly shift its economic trade partnership to East Asia and Southeast Asia. The economic centre is IE Singapore's second office in Africa, coming six months after opening in Johannesburg, South Africa in January 2013. Ghana's labour force in 2008 totalled 11.5 million Ghanaian citizens. Tema Harbour is Africa's largest  harbour and Takoradi Harbour along with Tema harbour in Ghana handles goods and exports for Ghana. They are also traffic junctions where goods are transhipped; the Tema harbour handles the majority of the nation's export cargo and most of the country's chief exports is shipped from Takoradi harbour. The Takoradi harbour and Tema harbour are operated by the state-owned Ghana Ports and Harbours Authority.