condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.008454916666666666 0.008454916666666666 0.008454916666666666 ZT12-15 0.0038292499999999998 0.0038292499999999998 0.0038292499999999998 ZT16-19 0.0053820000000000005 0.0053820000000000005 0.0053820000000000005 ZT20-23 0.0 0.0 0.0