<Table> Relative sizes of the main offices of the United Nations ( in 2015 ) <Tr> <Th> Location </Th> <Th> Number of employees in offices of the United Nations </Th> </Tr> <Tr> <Th> New York City </Th> <Td> 10,000 </Td> </Tr> <Tr> <Th> Geneva </Th> <Td> 9,800 </Td> </Tr> <Tr> <Th> Nairobi </Th> <Td> 4,000 </Td> </Tr> <Tr> <Th> Vienna </Th> <Td> 4,000 </Td> </Tr> <Tr> <Th> Rome </Th> <Td> 3,200 </Td> </Tr> <Tr> <Th> Copenhagen </Th> <Td> 1,350 </Td> </Tr> </Table>
where the headquarters of each of the six main organs of the un are located
New York City Geneva Nairobi Vienna Rome Copenhagen