condition mean min max ZT0-3 0.02917516666666667 0.0 0.0875255 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0361985 0.0 0.072397 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0