condition mean min max ZT0-3 0.022887025 0.02287165 0.0229024 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02331325 0.02331325 0.02331325 ZT12-15 0 0 0 ZT16-19 0.04516395 0.04516395 0.04516395 ZT20-23 0.0 0.0 0.0