Income tax for the year 1966-67 shall be charged, in the case of an individual whose total income exceeded £2,000, in respect of the excess at rates in the pound which respectively exceed the standard rate by the amounts by which the higher rates for the year 1965-66, without the increase made by the next following section, exceeded the standard rate for that year (and so that the surtax rates applied by this section are the same as those applied successively for the years 1951-52 to 1964- 65).