condition mean min max ZT0-3 0.016388166666666665 0.0 0.0253842 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0490243 0.0490243 0.0490243 ZT12-15 0.013309 0.0 0.026618 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0