condition mean min max ZT0-3 2914.35 2914.35 2914.35 ZT4-7 2087.6 2087.6 2087.6 ZT8-11 2117.2 2117.2 2117.2 ZT12-15 1995.2 1995.2 1995.2 ZT16-19 2543.7 2543.7 2543.7 ZT20-23 2914.6 2914.6 2914.6