condition mean min max ZT0-3 0.024511033333333335 0.024511033333333335 0.024511033333333335 ZT4-7 0.0131635 0.0131635 0.0131635 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03726395 0.03726395 0.03726395 ZT16-19 0.0 0.0 0.0 ZT20-23 0.023406399999999997 0.023406399999999997 0.023406399999999997