SetDParam(1, month + STR_MONTH_ABBREV_JAN + 2);

				SetDParam(2, year);

				x_label_width = max(x_label_width, GetStringBoundingBox(month == 0 ? STR_GRAPH_X_LABEL_MONTH_YEAR : STR_GRAPH_X_LABEL_MONTH).width);

				month += 3;

				if (month >= 12) {

					month = 0;

					year++;

				}

			}

		} else {

			/* Draw the label under the data point rather than on the grid line. */

			x_label_width = GetStringBoundingBox(STR_GRAPH_Y_LABEL_NUMBER).width;

		}

		SetDParam(0, this->format_str_y_axis);

		SetDParam(1, INT64_MAX);

		uint y_label_width = GetStringBoundingBox(STR_GRAPH_Y_LABEL).width;

		size->width  = max<uint>(size->width,  5 + y_label_width + this->num_on_x_axis * (x_label_width + 5) + 9);

		size->height = max<uint>(size->height, 5 + (1 + MIN_GRAPH_NUM_LINES_Y * 2 + (this->month != 0xFF ? 3 : 1)) * FONT_HEIGHT_SMALL + 4);

		size->height = max<uint>(size->height, size->width / 3);

	}