condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.014746200000000001 0.014746200000000001 0.014746200000000001 ZT12-15 0.021165600000000003 0.021165600000000003 0.021165600000000003 ZT16-19 0.016039966666666666 0.016039966666666666 0.016039966666666666 ZT20-23 0.0 0.0 0.0