condition mean min max ZT0-3 0.036267850000000004 0.036267850000000004 0.036267850000000004 ZT4-7 0.0 0.0 0.0 ZT8-11 0.012518 0.012518 0.012518 ZT12-15 0.0 0.0 0.0 ZT16-19 0.04019855 0.04019855 0.04019855 ZT20-23 0.005 0.005 0.005