condition mean min max ZT0-3 0.08140766666666667 0.0 0.244223 ZT4-7 0.34287 0.34287 0.34287 ZT8-11 0.0 0.0 0.0 ZT12-15 0.258866 0.244851 0.272881 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0