condition mean min max ZT0-3 0.0198108 0.0198108 0.0198108 ZT4-7 0.02303435 0.02303435 0.02303435 ZT8-11 0.0251896 0.0251896 0.0251896 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01006135 0.01006135 0.01006135