condition mean min max ZT0-3 0.024161127499999997 0.018947785999999998 0.029374468999999997 ZT4-7 0.0092818105 0.0 0.018563621 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0