condition mean min max ZT0-3 0.050414999999999995 0.0 0.151245 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 0.082026 0.082026 0.082026