condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0336049 0.0336049 0.0336049 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03325235 0.03325235 0.03325235 ZT16-19 0.02907615 0.02907615 0.02907615 ZT20-23 0.0 0.0 0.0