condition mean min max ZT0-3 0.012367466666666667 0.0 0.024734933333333334 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.013601625 0.0 0.02720325 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0