condition mean min max ZT0-3 0.06115125 0.0 0.1223025 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02489375 0.0 0.0497875 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0