condition mean min max ZT0-3 5021.9 5021.9 5021.9 ZT4-7 8657.0 8657.0 8657.0 ZT8-11 8540.0 8540.0 8540.0 ZT12-15 5557.1 5557.1 5557.1 ZT16-19 2991.2 2991.2 2991.2 ZT20-23 2575.05 2575.05 2575.05