condition mean min max ZT0-3 0.01686585 0.01686585 0.01686585 ZT4-7 0.0 0.0 0.0 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 0.03034195 0.03034195 0.03034195