condition mean min max ZT0-3 2637.4 2637.4 2637.4 ZT4-7 1392.4 1392.4 1392.4 ZT8-11 1547.9 1547.9 1547.9 ZT12-15 1671.85 1671.85 1671.85 ZT16-19 2236.3 2236.3 2236.3 ZT20-23 3085.0 3085.0 3085.0