condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.046884 0.046884 0.046884 ZT16-19 0.155185 0.155185 0.155185 ZT20-23 0.0 0.0 0.0