• 1970 to 1970 34
• 1971 to 1971 35
• 1972 to 1972 39
• 1973 to 1973 41
• 1974 to 1974 43
• 1975 to 1975 53
• 1976 to 1976 56
• 1977 to 1977 59
• 1978 to 1978 58
• 1979 to 1979 50