condition mean min max ZT0-3 0.021859733333333332 0.0 0.0338302 ZT4-7 0.0310661 0.0310661 0.0310661 ZT8-11 0.0 0.0 0.0 ZT12-15 0.032628 0.0 0.065256 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0