the sequence of pairs of numbers (0,0) that describe the analysed attribute should be arranged in descending order, where the position of the pair in the ordered sequence is determined by the number 0 of the occurrences of the attribute an according to the principle 0+1 ≤0 for each n∈Na determination of the percentage of occurrences 0 of the attribute an in the sum of all examined people and the cumulative percentage in accordance with the formula: