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 0.018456166666666666 0.0 0.03691233333333333 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0