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 0.047348649666666666 0.044349433333333334 0.050347866 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0