condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.05054055 0.05054055 0.05054055 ZT8-11 0.04051315 0.04051315 0.04051315 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0