void CollectStatistic () {
        step++;

        defectorsRegionsPerimeter = Perimeter ();
        allDefectorsRegionsPerimeter += defectorsRegionsPerimeter;
        averegeDefectorsRegionsPerimeter = (double)allDefectorsRegionsPerimeter / step;
        defectorsRegionsPerimeterDelta += (defectorsRegionsPerimeter - averegeDefectorsRegionsPerimeter) * (defectorsRegionsPerimeter - averegeDefectorsRegionsPerimeter);
        defectorsRegionsPerimeterDispersion = (double)defectorsRegionsPerimeterDelta / step;
        defectorsRegionsPerimeterError = (step > 1)? System.Math.Sqrt (defectorsRegionsPerimeterDispersion / (step - 1)) : 0;

        defectorsPercentage = 100 * (double)GetCount(map, PlayerType.D) / (map.GetLength(0)*map.GetLength(0));
        allDefectorsPercentage += defectorsPercentage;
        averegeDefectorsPercentage = allDefectorsPercentage / step;
        defectorsPercentageDelta += (defectorsPercentage - averegeDefectorsPercentage) * (defectorsPercentage - averegeDefectorsPercentage);
        defectorsPercentageDispersion = (double)defectorsPercentageDelta / step;
        defectorsPercentageError = (step > 1)? System.Math.Sqrt (defectorsPercentageDispersion / (step - 1)) : 0;
    }