condition mean min max ZT0-3 0.20208 0.0 0.60624 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.1525075 0.0 0.305015 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0