condition mean min max ZT0-3 0.022709816666666667 0.0 0.045419633333333334 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.00986705 0.0 0.0197341 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0