condition mean min max ZT0-3 0.08812766666666666 0.0 0.1804315 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.174207 0.168335 0.180079 ZT16-19 0.0 0.0 0.0 ZT20-23 0.090899 0.090899 0.090899