condition mean min max ZT0-3 0.03080776666666667 0.0 0.0630755 ZT4-7 0.0 0.0 0.0 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 0.06472744999999999 0.06472744999999999 0.06472744999999999