condition mean min max ZT0-3 79.8 79.8 79.8 ZT4-7 45.4 45.4 45.4 ZT8-11 77.6 77.6 77.6 ZT12-15 131.15 131.15 131.15 ZT16-19 162.35 162.35 162.35 ZT20-23 95.1 95.1 95.1