condition mean min max ZT0-3 49.5 49.5 49.5 ZT4-7 47.4 47.4 47.4 ZT8-11 45.8 45.8 45.8 ZT12-15 92.85 92.85 92.85 ZT16-19 78.5 78.5 78.5 ZT20-23 76.65 76.65 76.65