condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.011078183333333333 0.0 0.022156366666666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0