condition mean min max ZT0-3 0.012939375 0.0 0.02587875 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.05084215 0.05084215 0.05084215 ZT20-23 0.02544195 0.02544195 0.02544195