condition mean min max ZT0-3 0.3846616666666666 0.0 0.597745 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3107575 0.0 0.621515 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0