condition mean min max ZT0-3 0.090984842 0.0 0.181969684 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2360506205 0.0 0.472101241 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0500886055 0.0 0.100177211