• 1960 to 1961 1
• 1962 to 1963 0
• 1964 to 1965 0
• 1966 to 1967 0
• 1968 to 1969 0
• 1970 to 1971 1
• 1972 to 1973 1
• 1974 to 1975 0
• 1976 to 1977 1