condition mean min max ZT0-3 0.0133735 0.0 0.026747 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02717835 0.02717835 0.02717835 ZT12-15 0 0 0 ZT16-19 0.0262222 0.0262222 0.0262222 ZT20-23 0.0 0.0 0.0