condition mean min max ZT0-3 0.014637666666666667 0.0 0.043913 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0214808 0.0 0.0429616 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0