condition mean min max ZT0-3 0.013483066666666666 0.0 0.0404492 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0411022 0.0411022 0.0411022