condition mean min max ZT0-3 0.6114566666666666 0.0 1.83437 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.919795 0.0 1.83959 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0