condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0422701 0.0422701 0.0422701 ZT8-11 0.0577705 0.0577705 0.0577705 ZT12-15 0.05983 0.05983 0.05983 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0