condition mean min max ZT0-3 0.015580006333333334 0.0 0.031160012666666667 ZT4-7 0.0168013175 0.0 0.033602635 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0