condition mean min max ZT0-3 0.039573750000000005 0.0 0.08214 ZT4-7 0.03716925 0.03716925 0.03716925 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 0.03967895 0.03967895 0.03967895