condition mean min max ZT0-3 0.01708950075 0.0 0.0341790015 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.03921530116666667 0.027410891999999996 0.051019710333333336 ZT20-23 0.0 0.0 0.0