condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.032880994499999996 0.0 0.06576198899999999 ZT20-23 0.06103309233333333 0.056361568333333334 0.06570461633333333