premise: Beginning in 1960 , the matching requirements for the base allotment are being adjusted ( upward or downward , as required ) 25 % a year , so that by 1963 the entire support allotment will be matched on the basis of a 40 % pivot State share , with maximum and minimum State shares of 50 % and <mask> % , respectively .
hypothesis: the proper context for <mask> here should be the cardinal number that is the product of ten and three