condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.018005368166666667 0.017447115333333332 0.018563621 ZT8-11 0.0091363855 0.0 0.018272771 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0