condition mean min max ZT0-3 0.07579066666666666 0.0 0.227372 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03654875 0.0 0.0730975 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0