condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.017717332666666665 0.01687104433333333 0.018563621 ZT8-11 0.009616586 0.0 0.019233172 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0