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 0.019515671833333335 0.0 0.03903134366666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0