condition mean min max ZT0-3 2899.2 2899.2 2899.2 ZT4-7 3913.6 3913.6 3913.6 ZT8-11 4063.0 4063.0 4063.0 ZT12-15 4296.0 4296.0 4296.0 ZT16-19 4141.95 4141.95 4141.95 ZT20-23 3978.5 3978.5 3978.5