condition mean min max ZT0-3 1998.05 1998.05 1998.05 ZT4-7 2513.7 2513.7 2513.7 ZT8-11 2651.85 2651.85 2651.85 ZT12-15 2414.3999999999996 2414.3999999999996 2414.3999999999996 ZT16-19 2365.5 2365.5 2365.5 ZT20-23 2204.2 2204.2 2204.2