condition mean min max ZT0-3 0.35575175000000003 0.1903675 0.521136 ZT4-7 0.1098765 0.1098765 0.1098765 ZT8-11 0.0550046 0.0550046 0.0550046 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0