In conjunction with each municipal revaluation of property in accordance with section 12-62, each municipality shall increase (1) the amount of the exemption granted pursuant to subdivisions (19), (20), (21), (22), (23), (24), (25) and (26) of section 12-81, and (2) the amount of the exemption that each municipality may allow pursuant to section 12-81f, for such year and for each subsequent assessment year by multiplying the amount of exemption in each of said subdivisions by a multiplier determined by dividing the net taxable grand list for such year of revaluation by the net taxable grand list of the last year prior to such revaluation and rounding off the product to the nearest integer.