condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0700012 0.0700012 0.0700012 ZT12-15 0.0243051875 0.0 0.048610375 ZT16-19 0.04050396666666666 0.0 0.08100793333333332 ZT20-23 0 0 0