condition mean min max ZT0-3 112.2 112.2 112.2 ZT4-7 136.2 136.2 136.2 ZT8-11 154.65 154.65 154.65 ZT12-15 174.5 174.5 174.5 ZT16-19 141.55 141.55 141.55 ZT20-23 137.7 137.7 137.7