condition mean min max ZT0-3 0.06589115 0.055018 0.08701235 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0276734 0.0276734 0.0276734 ZT12-15 0.015293775 0.0 0.03058755 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0