condition mean min max ZT0-3 0.02804942975 0.020703917 0.0353949425 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.008444836833333332 0.0 0.016889673666666664 ZT20-23 0.0 0.0 0.0