condition mean min max ZT0-3 0.017587652250000002 0.0 0.035175304500000004 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.012408810499999999 0.0 0.024817620999999998 ZT16-19 0.0 0.0 0.0 ZT20-23 0.008834174 0.0 0.017668348