condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.007680633333333333 0.0 0.015361266666666666 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0