condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.008435522166666666 0.0 0.01687104433333333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01515074716666667 0.014952578000000001 0.015348916333333336 ZT20-23 0.0 0.0 0.0