condition mean min max ZT0-3 0.037031883333333335 0.033639666666666665 0.0404241 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.007920875 0.0 0.01584175 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0