condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.01808755 0.01808755 0.01808755 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02374055 0.02374055 0.02374055 ZT16-19 0.03128705 0.03128705 0.03128705 ZT20-23 0.0078394 0.0078394 0.0078394