condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.021160036333333337 0.0 0.042320072666666673 ZT8-11 0.0 0.0 0.0 ZT12-15 0.025173933 0.0 0.050347866 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0