condition mean min max ZT0-3 0.0512875 0.02974775 0.09363 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.016948225 0.0 0.03389645 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0