• 1960 to 1960 2,887
• 1961 to 1961 3,665
• 1962 to 1962 4,151
• 1963 to 1963 3,454
• 1964 to 1964 3,306
• 1965 to 1965 3,243
• 1966 to 1966 3,418
• 1967 to 1967 3,465
• 1968 to 1968 2,869
• 1969 to 1969 1,650
• 1970 to 1970 1,554
• 1971 to 1971 480
• 1972 to 1972 380
• 1973 to 1973 50