condition mean min max ZT0-3 3427.5 3427.5 3427.5 ZT4-7 2867.3 2867.3 2867.3 ZT8-11 3484.8 3484.8 3484.8 ZT12-15 3031.2 3031.2 3031.2 ZT16-19 3109.05 3109.05 3109.05 ZT20-23 3856.25 3856.25 3856.25