condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0183507 0.0183507 0.0183507 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01610055 0.01610055 0.01610055 ZT20-23 0.00795345 0.00795345 0.00795345