condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.019154842 0.012185971 0.026123713 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01710077975 0.011114871 0.0230866885