condition mean min max ZT0-3 0.18513925 0.0 0.3702785 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1220385 0.1220385 0.1220385 ZT12-15 0 0 0 ZT16-19 0.2432535 0.2432535 0.2432535 ZT20-23 0.0 0.0 0.0