condition mean min max ZT0-3 1687.6 1687.6 1687.6 ZT4-7 2669.8 2669.8 2669.8 ZT8-11 2535.55 2535.55 2535.55 ZT12-15 2024.75 2024.75 2024.75 ZT16-19 1320.6 1320.6 1320.6 ZT20-23 1179.25 1179.25 1179.25