<Tr> <Td> Executive Secretary of Ghana Free Zones Authority </Td> <Td> Michael Okyere Baafi </Td> <Td> January 27, 2017 - </Td> </Tr> <Tr> <Td> Chief Executive Officer of National Petroleum Authority </Td> <Td> Hassan Tampuli </Td> <Td> January 27, 2017 - </Td> </Tr> <Tr> <Td> Managing Director of Tema Oil Refinery </Td> <Td> Isaac Osei </Td> <Td> January 7, 2017 - </Td> </Tr> <Tr> <Td> Chief Executive Officer of Ghana National Petroleum Corporation </Td> <Td> Kofi Koduah Sarpong (PhD) </Td> <Td> January 25, 2017 - </Td> </Tr>

How many ministries do we have in ghana 2017