condition mean min max ZT0-3 0.005287 0.005287 0.005287 ZT4-7 0.0042126 0.0042126 0.0042126 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0