condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.1093615 0.1093615 0.1093615 ZT8-11 0.0886045 0.0886045 0.0886045 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0