condition mean min max ZT0-3 0.015906025 0.0 0.03181205 ZT4-7 0.06386485 0.06386485 0.06386485 ZT8-11 0.0324263 0.0324263 0.0324263 ZT12-15 0 0 0 ZT16-19 0.0312855 0.0312855 0.0312855 ZT20-23 0.0 0.0 0.0