condition mean min max ZT0-3 0.030506166666666668 0.0 0.0729486 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.017541975 0.01732495 0.017759 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0