condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.020362286166666667 0.0 0.040724572333333334 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0