condition mean min max ZT0-3 0.03465975 0.0 0.0693195 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.05268183333333334 0.0 0.10536366666666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0