In 1960, cupro-nickel 1-dollar coins were introduced, these were then reduced in size in 1978. They were followed in 1975 by nickel-brass 20 cents and cupro-nickel 2-dollar (both scallop shaped), and in 1976 by decagonal, cupro-nickel 5-dollar coin, changed to a round thicker shape in 1980. The 5-cent coin was last issued in 1979, but last struck in 1988.