condition mean min max ZT0-3 0.017685733666666665 0.0 0.03537146733333333 ZT4-7 0.016323306 0.0 0.032646612 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0