<Tr> <Th> Edge </Th> <Td> Plain </Td> </Tr> <Tr> <Th> Composition </Th> <Td> 97% copper 2.5% zinc 0.5% tin </Td> </Tr> <Tr> <Th> Years of minting </Th> <Td> 1966--1991 </Td> </Tr> <Tr> <Th_colspan="2"> Obverse </Th> </Tr>

When did 1c and 2c coins phased out