condition mean min max ZT0-3 0.0193975 0.0193975 0.0193975 ZT4-7 0.021574 0.021574 0.021574 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02381735 0.02381735 0.02381735 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0140788 0.0140788 0.0140788