condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.014036612499999998 0.0 0.028073224999999997 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.013204691166666666 0.0 0.026409382333333332 ZT20-23 0.0 0.0 0.0