Proof sets including: (2) 1972, (2) 1973, (2) 1974, (2) 1975, (5) 1976, (3) 1977, (3) 1978, (3) 1979, (3) 1980, (3) 1981, (3) 1982; mint sets including: (3) 1974, (3) 1975