condition mean min max ZT0-3 0.0173142 0.0 0.0346284 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.014263 0.0 0.028526 ZT16-19 0.010615 0.0 0.02123 ZT20-23 0 0 0