condition mean min max ZT0-3 0.025760166666666667 0.025760166666666667 0.025760166666666667 ZT4-7 0.0431985 0.0431985 0.0431985 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01421475 0.01421475 0.01421475 ZT16-19 0.012469099999999999 0.012469099999999999 0.012469099999999999 ZT20-23 0.0 0.0 0.0