condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0973375 0.0973375 0.0973375 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3395235 0.3395235 0.3395235 ZT16-19 0.071035 0.071035 0.071035 ZT20-23 0.0 0.0 0.0