condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.014992027166666666 0.0 0.029984054333333333 ZT12-15 0.0433035555 0.0 0.086607111 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0