• 1959 to 1959 1
• 1960 to 1961 4
• 1962 to 1964 3
• 1965 to 1966 3
• 1967 to 1969 4
• 1970 to 1971 1
• 1972 to 1974 2
• 1975 to 1976 2
• 1977 to 1979 1
• 1980 to 1981 1
• 1982 to 1984 1
• 1985 to 1985 2