1960 MarchJulyNovemberDecember 1961 FebruaryMarchAprilMayJulyAugust September OctoberNovember 1962 January MarchAprilMay JuneAugust September October November December 1963 February MarchAprilMay JuneJuly- August September November December 1964 FebruaryMarchApril May-JuneJuly August-September October November 1965 January-FebruaryMarch 1966 February OctoberDecember 1967 January-February April-May June- JulyAugust September October December 1968 FebruaryApril May - June 1969 March July September-October December
