condition mean min max ZT0-3 0.009806966666666667 0.0 0.019613933333333333 ZT4-7 0.017751 0.017751 0.017751 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