condition mean min max ZT0-3 0.02016245 0.02016245 0.02016245 ZT4-7 0.0383811 0.0383811 0.0383811 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0