condition mean min max ZT0-3 0.20695425 0.0 0.4139085 ZT4-7 0.0702135 0.0702135 0.0702135 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0683155 0.0683155 0.0683155