<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2015) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2015) (Learn how and when to remove this template message) </Td> </Tr> <Table> Halfpenny <Tr> <Td_colspan="2"> United Kingdom </Td> </Tr> <Tr> <Th> Value </Th> <Td> 0.005 pound sterling </Td> </Tr> <Tr> <Th> Mass </Th> <Td> 1.78 g </Td> </Tr> <Tr> <Th> Diameter </Th> <Td> 17.14 mm </Td> </Tr> <Tr> <Th> Thickness </Th> <Td> 1 mm </Td> </Tr> <Tr> <Th> Edge </Th> <Td> plain </Td> </Tr> <Tr> <Th> Composition </Th> <Td> bronze </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> 1971--1984 </Td> </Tr> <Tr> <Th_colspan="2"> Obverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> Queen Elizabeth II </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Arnold Machin </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1971 </Td> </Tr> <Tr> <Th_colspan="2"> Reverse </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Design </Th> <Td> St Edward's Crown </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Christopher Ironside </Td> </Tr> <Tr> <Th> Design date </Th> <Td> 1971 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> United Kingdom </Td> </Tr>

When did they get rid of the half penny