condition mean min max ZT0-3 0.0135397 0.0135397 0.0135397 ZT4-7 0.0186982 0.0186982 0.0186982 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01629795 0.01629795 0.01629795 ZT20-23 0.0 0.0 0.0